KR20090014683A - Method and system for providing advertisement using ranking index - Google Patents

Abstract

A method and a system for offering an advertisement by using a ranking index calculated and maintained by using a quality index are provide to show advertising contents to a person only who is interested in a particular product or a case, thereby increasing a targeted advertising effect and an advertising clicking ratio. An advertisement DB for an advertisement and an advertiser DB for an advertiser of the advertisement are unified(S101). An advertisement pool including the advertisement DB and the advertiser DB is stacked and maintained(S102). A ranking index of the advertisement is calculated and maintained by using a quality index(S103). The advertisement is provided based on the ranking index(S104).

Description

METHOD AND SYSTEM FOR PROVIDING ADVERTISEMENT USING RANKING INDEX}

Keyword advertising is a form of advertisement in which advertisers display a advertisement on a search result page when a user searches for a keyword including a keyword after purchasing a specific keyword. For example, if a user searches for a keyword related to "director," you'll see ads related to directors, such as "packaging director" and "moving center," which are often unspecified in that the ad is only shown to people with specific products or interests. It is not the same as the existing banner advertisement for. That is, since the content of the advertisement can be shown only to a person interested in a specific product or issue, the targeted advertisement effect can be enhanced, and the advertisement clickthrough rate is high.

Such keyword ads include CPC and CPM ads. Cost-per-click refers to a method in which an advertisement is paid only for a click, regardless of the number of impressions after a search occurs. In other words, the advertiser deposits a predetermined amount as much as the desired amount of money and then exposes the advertisement to the result of the associated keyword and deducts the cost-per-click only when the user clicks on the link. Cost Per Mill (CPM) refers to an advertising method that proceeds irrespective of a click after a fixed amount is set as a flat rate for an ad that is executed for a certain period of time.

In the prior art, keyword advertisements are ranked by using only bid prices for various advertisement regions and exposed according to the ranking of the advertisements. In other words, the user can only view the advertisement based on the bid price of the advertiser regardless of the quality of the advertisement or the effect of the advertisement. In addition, from the advertiser's point of view, there is a problem of bidding keywords for a large number of advertisement areas in order to expose an advertisement in various advertisement areas.

The present invention integrates advertisements that have been exposed to various advertisement areas, so that advertisers do not make a plurality of bids to expose an advertisement through the various advertisement areas. It provides a method and system for providing advertisement that can be exposed.

The present invention reflects the quality of an advertisement and the effect of the advertisement in the exposure ranking of the advertisement so that a high-quality advertisement is exposed at the top, thereby providing a high-quality advertisement to the user and increasing the number of clicks on the advertisement. It provides a method and system for providing an advertisement.

The present invention reflects the quality of the advertisement and the effect of the advertisement in the exposure ranking of the advertisement to expose the high-quality ads to the top, it is possible to expose the advertiser's ads to the top through the low advertising costs from the advertiser's perspective Provide a method and system for providing an advertisement.

The present invention calculates a ranking index using a quality factor representing the quality of an advertisement and a click-through rate (CTR) representing the effect of the advertisement, and exposes the advertisement through the ranking index. Provided is an advertisement providing method and system capable of reflecting quality and effects in the exposure ranking of the advertisement.

An advertisement providing method according to an embodiment of the present invention includes calculating and maintaining a ranking index of an advertisement using a quality index, and providing the advertisement based on the ranking index. In this case, the advertisement providing method further comprises the step of unifying the advertisement database for the advertisement and the advertiser database for the advertiser of the advertisement and accumulating and maintaining an advertisement pool including the advertisement database and the advertiser database. It may include.

According to an aspect of the present invention, the quality index may be calculated using a quality factor, a pre-evaluation factor for the listing of the advertisement, and a click-through rate (CTR), a post-evaluation factor. . In this case, the quality index may be a sum between the quality factor and the CTR to which the first weight and the second weight are respectively assigned, and the first weight and the second weight are the sum between the first weight and the second weight. May be set to be a predetermined integer. In addition, the quality factor may be measured based on a previously evaluated index by analyzing a user's pattern such as a title & description score, a site authority, and a site score associated with the advertisement. have. The quality factor may be calculated using the T & D score, the site popularity, and the site score to which the third weight value, the fourth weight value, and the fifth weight value are respectively assigned. It may be determined according to the correlation coefficient with the CTR.

According to an aspect of the invention, the step of calculating and maintaining the ranking index of the advertisement using the quality index may be a step of calculating the ranking index of the advertisement based on the maximum click cost and the quality index of the advertisement. In this case, the maximum click cost and the quality index may be given different weights, and the rank index may be calculated through a multiplication operation between the maximum click cost and the quality index to which the first and second weights are respectively assigned. Can be.

The advertisement providing system according to an embodiment of the present invention includes a ranking index calculation unit for calculating a ranking index of an advertisement using a quality index, a ranking index maintaining unit for storing and maintaining the ranking index in association with a corresponding advertisement, and the And an advertisement providing unit that provides the advertisement based on a ranking index. In this case, the advertisement providing system may further include an advertisement pool including an advertisement database for the advertisement and an advertiser database for the advertiser of the advertisement, and an integration unit for unifying the advertisement database and the advertiser database.

According to the present invention, by integrating advertisements that have been exposed to various advertisement regions, advertisers do not make a plurality of bids to expose an advertisement through the various advertisement regions. To expose advertising.

According to the present invention, the quality of the advertisement and the effect of the advertisement is reflected in the exposure ranking of the advertisement so that a high quality advertisement is exposed at the top, thereby providing a high quality advertisement to the user and increasing the number of clicks of the advertisement. You can.

According to the present invention, by reflecting the quality of the advertisement and the effect of the advertisement in the exposure ranking of the advertisement so that the high-quality advertisement is exposed to the upper level, the advertiser's advertisement is exposed to the upper level even through a low advertising cost from the advertiser's position You can.

According to the present invention, a ranking index is calculated using a quality factor indicating the quality of an advertisement and a click-through rate (CTR) indicating the effect of the advertisement, and the advertisement is exposed through the ranking index. The quality and effect of the advertisement may be reflected in the exposure ranking of the advertisement.

Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

The present invention improves the quality of the search results by eliminating duplicate exposure of the same advertisement in various advertisement areas while integrating and exposing the advertisement products into one product platform, and calculating the ranking reflecting the quality and effect of the advertisement. The present invention relates to a method and a system for providing an advertisement that provides a user with high quality information to increase the number of clicks on an advertisement and provides an advertisement to the various advertisement areas through a single bid.

1 is a flowchart illustrating an advertisement providing method according to an embodiment of the present invention.

The advertisement providing system for providing an advertisement in step S101 unifies the advertisement database for the advertisement and the advertiser database for the advertiser of the advertisement. That is, the advertisement providing system may unify a plurality of databases managed separately according to various advertisement regions into the advertisement database and the advertiser database.

In step S102, the advertisement providing system accumulates and maintains an advertisement pool including the advertisement database and the advertiser database. At this time, it is obvious that the advertisement database and the advertiser database may be managed in association with each other or through a single advertisement database stored in correspondence between the advertisement and the advertiser.

In step S103, the advertisement providing system calculates and maintains the rank index of the advertisement using the quality index. In this case, the advertisement providing system may calculate the ranking index of the advertisement based on the maximum click cost and the quality index of the advertisement. In this case, the maximum click cost and the quality index may each be weighted. That is, the rank index may be calculated through a multiplication operation between the maximum click cost and the quality index, to which first and second weights are respectively assigned. In addition, the maximum click cost may be input through an advertiser of the advertisement as a maximum cost per click of the advertisement.

The quality index may be calculated using a quality factor, which is a pre-evaluation factor for listing of the advertisement, and a click-through rate (CTR), which is a post-evaluation factor. In this case, the quality index may be a sum between the quality factor and the CTR to which a third weight and a fourth weight are respectively assigned, and the third weight and the fourth weight correspond to the third weight and the fourth weight. The sum may be set to be a predetermined integer. For example, the sum of the third weight and the fourth weight may be set to be '1'.

The quality factor may be measured based on a Title & Description score, a site authority, and a site score associated with the advertisement. In this case, the quality factor may be calculated using the T & D score, the site popularity, and the site score to which the fifth weight, the sixth weight, and the seventh weight are respectively assigned, and the fifth to seventh weights. May be determined according to the correlation coefficient with the CTR. Here, the factor for measuring the quality factor is not limited to the T & D score, site popularity, and site score, and of course, any other indicator that is evaluated in advance by analyzing a user pattern may be used. Hereinafter, for convenience of description, only the three elements will be described in detail.

In step S104, the advertisement providing system provides the advertisement based on the ranking index. In this case, the advertisement providing system may provide a predetermined number of advertisements in the order of the ranking index. That is, the advertisement providing system may extract a predetermined number of advertisements from the advertisement database in the order of high rank index and expose them to the corresponding advertisement region.

For advertisements having the same rank index, an advertisement to be first exposed may be selected using at least one of the quality index, the CTR, the allowable budget, and the registration order. For example, when there are a plurality of advertisements having the same rank index, the advertisement having the high quality index is preferentially exposed, and when the quality index is the same, the advertisement having the high CTR may be preferentially exposed.

2 is an example for explaining a method of calculating the rank index. In this case, as shown in FIG. 2, the rank index 201 may be calculated using the maximum click cost 202 and the quality index 203, and the quality index 203 may be the quality factor 204 and the CTR 205. Can be calculated using Quality factor 204 can also be obtained using T & D score 206, site popularity 207, and site score 208.

That is, the advertisement providing system assigns a first weight value and a second weight value to the maximum click cost 202 and the quality index 203 to calculate the ranking index 201, respectively, and the first weight and the second weight. The multiplication operation may be performed on the maximum click cost 202 and the quality index 203 respectively. That is, the ranking index 201 may be expressed as Equation 1 below.

Rank index = (first weight * maximum click cost) * (second weight * quality index)

The maximum click cost 202 is a maximum cost that an advertiser of the advertisement is willing to pay when an advertisement registered in a keyword is clicked, and the maximum click cost 202 is determined by determining a minimum bid price that the advertiser can bid for each keyword. ) Can be limited.

The quality index 203 may be estimated by a combination of the quality factor 204, which is a pre-evaluation factor of the advertisement listing, and the CTR 205, which is a post-evaluation factor, as described above, and used to evaluate the quality of the advertisement listing. Can be.

In more detail, the quality index 203 may be calculated through a multiplication operation between the third weighted quality factor 204 and the fourth weighted CTR 205, and may be expressed as Equation 2 below. have.

Quality Index = (Third Weight * quality Factor ) + (4th weight * CTR )

In this case, the third weight and the fourth weight may be set such that the sum has a predetermined integer. For example, it may be set to have a value of '1'. In the advertisement providing system, a weight may be given to the pre-evaluation element or the post-evaluation element by adjusting the ratio between the third weight and the fourth weight. That is, an advertisement is provided using the first set third weight value and the fourth weight value, and the ratio between the third weight value and the fourth weight value is determined by correlation analysis between the quality index 203, the CTR 205, and the sales of the advertisement. Can be adjusted.

In addition, the quality index 203 may have a more objective value by correcting the difference between the maximum value and the minimum value so that a predetermined difference does not occur with respect to the listing of the advertisement exposed according to the corresponding keyword.

The quality factor 204 may be measured based on at least one of the T & D score 206, site popularity 207, and site score 208 associated with the advertisement. That is, the advertisement providing system may measure the quality factor 204 using a desired element as needed. When using the T & D score 206, the site popularity 207, and the site score 208, Equation 2 may be expressed as Equation 3 below.

Quality Index = (Third Weight * * ((Fifth Weight * T & D Score) + (Sixth Weight *

Site popularity) + (seventh weight * site score))) + (fourth weight * CTR )

The T & D score 206 is a relevance value of the T & D set by the advertiser of the advertisement. The T & D score 206 is a first relevance value representing a keyword and the T & D, and a second relevance value representing a word between the words in the T & D. Can be measured. For example, it may be measured through the sum of the first correlation value and the second correlation value.

Site popularity (207) is a rating system that is measured using the number of user visits, user satisfaction, and relevance of the site. In the case of an advertising site, the site popularity (207) is a quality index using the site popularity (207). (203), inter alia, to calibrate the quality factor 204, which is a pre-evaluation factor.

The site score 208 is a value measured by crawling the site by the correlation between the site and the keyword, and may adjust the seventh weight according to the depth and the technology of the crawl. For example, a score may be used to determine a content match (CM) relevance for an advertiser's site or a ranking on a search algorithm of web search. In the case of using the score for determining the level on the search algorithm, it is also possible to use the previously measured score as it is.

3 is an example for explaining the method of measuring the CTR. The CTR 205 described with reference to FIG. 2 may be measured using a listing's ranking 311, impressions 312, and clicks 313. More specifically, using the rank 311, impressions 312 and clicks 313 as in reference 310 can obtain the actual measurement CTR 314 of the listing. In this case, the actual measurement CTR 314 must pass the number of trusted impressions, and may be a value from which invalid clicks and invalid impressions are removed.

In this case, the confidence exposure number may use the actual measurement CTR 314 as a reliable standard so as to calculate the quality index reflecting the quality and effect of the advertisement. For example, if the ad's listing is not twice the same as the actual measured CTR for 2 impressions and 1 click and 200 impressions and 100 clicks during the day, Only the actual advertising CTR can be accepted and reflected in the quality index.

In this case, by removing the ranking element from the actual measurement CTR 314, subtracting the average CTR 321 for each ranking, which is the average CTR of all keywords of the ranking, in the actual measurement CTR 314 as shown by reference numeral 320. The reference numeral 322 can be obtained using the method, and the rank correction CTR 331 can be obtained by calculating the weighted average according to the number of exposures 312. The ranking correction CTR 331 obtained as described above may be used as the CTR 205 as the ranking element is removed from the actual measurement CTR 314.

4 is a block diagram illustrating an internal configuration of an advertisement providing system according to an embodiment of the present invention. As shown in FIG. 4, the advertisement providing system 400 includes an advertisement pool 401, an integrated unit 402, a ranking index calculation unit 403, a ranking index maintaining unit 404, and an advertisement providing unit 405. do.

Ad pool 401 includes an advertisement database for an advertisement and an advertiser database for an advertiser of the advertisement. In this case, the advertisement database and the advertiser database may be managed in association with each other or through one advertisement database stored in correspondence between the advertisement and the advertiser.

The integration unit 402 unifies the advertisement database and the advertiser database. That is, the integration unit 402 may unify a plurality of databases managed separately according to various advertisement areas into the advertisement database and the advertiser database.

The ranking index calculation unit 403 calculates the ranking index of the advertisement using the quality index. In this case, the ranking index calculator 403 may calculate the ranking index of the advertisement based on the maximum click cost and the quality index of the advertisement. In this case, the maximum click cost and the quality index may each be weighted. That is, the rank index may be calculated through a multiplication operation between the maximum click cost and the quality index, to which first and second weights are respectively assigned. In addition, the maximum click cost may be input through an advertiser of the advertisement as a maximum cost per click of the advertisement.

The quality index may be calculated using a quality factor, which is a pre-evaluation factor for listing of the advertisement, and a click-through rate (CTR), which is a post-evaluation factor. In this case, the quality index may be a sum between the quality factor and the CTR to which a third weight and a fourth weight are respectively assigned, and the third weight and the fourth weight correspond to the third weight and the fourth weight. The sum may be set to be a predetermined integer. For example, the sum of the third weight and the fourth weight may be set to be '1'.

The quality factor may be measured based on a Title & Description score, a site authority, and a site score associated with the advertisement. In this case, the quality factor may be calculated using the T & D score, the site popularity, and the site score to which the fifth weight, the sixth weight, and the seventh weight are respectively assigned, and the fifth to seventh weights. May be determined according to the correlation coefficient with the CTR.

In more detail, the rank index may be calculated using the maximum click cost and the quality index, and the quality index may be calculated using the quality factor and the CTR. In addition, the quality factor may be obtained using the T & D score, the site popularity, and the site score.

That is, the ranking index calculation unit 403 assigns a first weight and a second weight to the maximum click cost and the quality index, respectively, and calculates the first weight and the second weight, respectively, to calculate the ranking index. The multiplication operation for the maximum click cost and the quality index can be performed. That is, the rank index may be expressed as Equation 1 described with reference to FIG. 2.

The maximum click cost may mean a maximum cost that an advertiser of the advertisement is willing to pay when an advertisement registered in a keyword is clicked. At this time, the minimum bid price that the advertiser can bid for each keyword may be determined in advance to limit the lowest price of the maximum click cost.

In addition, the quality index may be calculated by a combination of the quality factor, which is a pre-evaluation factor of the advertisement listing, and the CTR, which is a post-evaluation factor, as described above, and may be used to evaluate the quality of the advertisement listing.

That is, the quality index may be calculated through a multiplication operation between the quality factor to which the third weight is assigned and the CTR to which the fourth weight is assigned, and may be expressed as Equation 2 described with reference to FIG. 2.

In this case, the third weight and the fourth weight may be set such that the sum has a predetermined integer. For example, it may be set to have a value of '1'. The ranking index calculation unit 403 may weight the pre-assessment element or the post-evaluation element by adjusting the ratio between the third and fourth weights. That is, the advertisement may be provided using the first set weight and the fourth weight, and the ratio between the third weight and the fourth weight may be adjusted through a correlation analysis between the quality index, the CTR, and the sales of the advertisement. .

In addition, the quality index may have a more objective value by correcting the difference between the maximum value and the minimum value so that a predetermined difference does not occur with respect to the listing of the advertisement exposed according to the corresponding keyword.

The quality factor may be measured based on at least one of a T & D score, a site popularity, and a site score associated with the advertisement. That is, the rank index calculation unit 403 may measure the quality factor by using a desired factor as needed. When using both the T & D score, the site popularity, and the site score, the quality index may be expressed as in Equation 3 described with reference to FIG. 2.

The T & D score is a relevance value of the T & D set by the advertiser of the advertisement, and may be measured through a first relevance value indicating a keyword and an association between the T & D and a second relevance value indicating a word between the words in the T & D. have. For example, it may be measured through the sum of the first correlation value and the second correlation value.

The site popularity is a rating system that is measured by using the number of user visits, user satisfaction, and relevance of a site. In the case of an advertising site, the distribution of the site is inferior and biased. It can be used to correct the quality factor, which is a pre-evaluation factor.

The site score is a value measured by crawling the site by the correlation between the site and the keyword, and may adjust the seventh weight according to the depth and technology of the crawl. For example, a score may be used to determine a content match (CM) relevance for an advertiser's site or a ranking on a search algorithm of web search. In the case of using the score for determining the level on the search algorithm, it is also possible to use the previously measured score as it is.

The ranking index maintaining unit 404 stores and maintains the ranking index in association with the corresponding advertisement. As described above, the ranking index generated through the ranking index calculation unit 403 may be stored together with the corresponding advertisement, and the advertisement providing unit 405 described later may provide an advertisement according to the ranking index.

The advertisement providing unit 405 provides the advertisement based on the ranking index. At this time, the advertisement providing unit 405 may provide a predetermined number of advertisements in the order of the ranking index. That is, the advertisement providing unit 405 may extract a predetermined number of advertisements from the advertisement database in the order of the ranking index and expose them to the corresponding advertisement area.

For advertisements having the same rank index, an advertisement to be first exposed may be selected using at least one of the quality index, the CTR, the allowable budget, and the registration order. For example, when there are a plurality of advertisements having the same rank index, the advertisement having the high quality index is preferentially exposed, and when the quality index is the same, the advertisement having the high CTR may be preferentially exposed.

As described above, when the advertisement providing method or the advertisement providing system according to the present invention is integrated, the advertisers do not make a plurality of bids to expose the advertisements through the various advertisement regions by integrating advertisements which have been exposed to the various advertisement regions. The advertisement can be exposed to the various advertisement areas through a single bidding, and the high quality advertisement is exposed to the upper level by reflecting the quality of the advertisement and the effect of the advertisement in the exposure ranking of the advertisement, thereby providing a quality to the user. This can provide good ads and increase the clicks on the ads.

In addition, by reflecting the quality of the advertisement and the effect of the advertisement in the exposure ranking of the advertisement to ensure that the high-quality ads are exposed at the top, it is possible to expose the advertiser's ads to the top through the low advertising costs from the advertiser's point of view, The ranking index is calculated using a quality factor representing the quality of the advertisement and a click-through rate (CTR) representing the effect of the advertisement, and the quality and effect of the advertisement is exposed by exposing the advertisement through the ranking index. May be reflected in the exposure ranking of the advertisement.

Embodiments according to the present invention can be implemented in the form of program instructions that can be executed by various computer means can be recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

In the present invention as described above has been described by the specific embodiments, such as specific components and limited embodiments and drawings, but this is provided to help a more general understanding of the present invention, the present invention is not limited to the above embodiments. For those skilled in the art, various modifications and variations are possible from these descriptions.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and all the things that are equivalent to or equivalent to the claims as well as the following claims will belong to the scope of the present invention. .

1 is a flowchart illustrating an advertisement providing method according to an embodiment of the present invention.

2 is an example for explaining a method of calculating the rank index.

3 is an example for explaining the method of measuring the CTR.

4 is a block diagram illustrating an internal configuration of an advertisement providing system according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

201: ranking index

202: Max click cost

203: Quality Index

204: quality factor

205: Click-Through Rate (CTR)

206: T & D score

207: Site popularity

208: site score

Claims (18)

In the method of providing an advertisement, Calculating and maintaining a ranking index of the advertisement using the quality index; And Providing the advertisement based on the ranking index Ad providing method comprising a. The method of claim 1, The quality index is calculated using a quality factor, which is a pre-evaluation factor for listing of the advertisement, and a click-through rate (CTR), which is a post-evaluation factor. The method of claim 2, The quality index is calculated using the quality factor and the CTR to which the first weight and the second weight are respectively assigned. And wherein the first weight and the second weight are set such that a sum of the first weight and the second weight is a predetermined integer. The method of claim 2, Wherein the quality factor is measured based on at least one of a Title & Description score, a site authority, and a site score associated with the advertisement. The method of claim 3, The quality factor is calculated using the T & D score, the site popularity, and the site score to which a third weight, a fourth weight, and a fifth weight are respectively assigned. The third to fifth weight is determined according to the correlation coefficient with the CTR. The method of claim 1, The step of calculating and maintaining the rank index of the advertisement using the quality index, And a ranking index of the advertisement is calculated based on the maximum click cost and the quality index of the advertisement. The method of claim 6, The maximum click cost and the quality index are given different weights, The ranking index is calculated through the calculation between the first weight and the second weighted to each of the maximum click cost and the quality index is provided. The method of claim 6, The maximum click cost is input through the advertiser of the advertisement as the maximum cost per click of the advertisement. The method of claim 1, The step of providing the advertisement based on the ranking index, Advertisement providing method characterized in that to provide a predetermined number of advertisements in the order of the rank index. The method of claim 1, Centralizing an advertisement database for the advertisement and an advertiser database for an advertiser of the advertisement; And Accumulating and maintaining an advertisement pool including the advertisement database and the advertiser database; Ad providing method further comprising. A computer-readable recording medium in which a program for executing the method of any one of claims 1 to 10 is recorded. In a system for providing advertising, Rank index calculation for calculating the rank index of advertisements using the quality index; A ranking index maintaining unit for storing and maintaining the ranking index in association with a corresponding advertisement; And Ad providing unit for providing the advertisement based on the ranking index Advertisement providing system comprising a. The method of claim 12, The quality index is an advertisement providing system, characterized in that calculated using the quality factor and the post-evaluation factor CTR for the evaluation of the listing of the advertisement. The method of claim 13, The quality index is calculated using the quality factor and the CTR to which the first weight and the second weight are respectively assigned. And wherein the first weight and the second weight are set such that the sum of the first weight and the second weight is a predetermined integer. The method of claim 13, Wherein the quality factor is measured based on at least one of a T & D score, a site popularity, and a site score associated with the advertisement. The method of claim 12, The ranking index calculation, And a ranking index of the advertisement based on the maximum click cost and the quality index of the advertisement. The method according to claim 12, The advertisement providing unit, Advertisement providing system, characterized in that to provide a predetermined number of advertisements in the order of the ranking index. The method according to claim 12, An advertisement pool comprising an advertisement database for the advertisement and an advertiser database for an advertiser of the advertisement; And Integration unit for unifying the advertising database and the advertiser database Advertising providing system further comprising.

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