Google (GOOG)

The Technology Behind Google’s Advertising Programs

Our AdWords and AdSense programs serve millions of relevant, targeted ads each day based on search terms people enter or content they view on the web. The key elements of our advertising technology include:

Google AdWords Auction System. The Google AdWords auction system lets advertisers automatically deliver relevant, targeted advertising. Every search query we process involves the automated execution of an auction, resulting in our advertising system often processing hundreds of millions of auctions per day. To determine whether an ad is relevant to a particular query, this system weighs an advertiser’s willingness to pay for prominence in the ad listings (the cost-per-click or cost-per-impression bid) and interest from users in the ad as measured by the click-through rate and other factors. Our Quality-based bidding system also assigns minimum bids to advertiser keywords based on the Quality scores of those keywords—the higher the Quality score, the lower the minimum bid. The Quality score is determined by an advertiser’s keyword click-through rate, the relevance of the ad text, historical keyword performance, the quality of the ad’s landing page and other relevancy factors. This prevents advertisers with irrelevant ads from “squatting” in top positions to gain exposure, and rewards more relevant, well-targeted ads that are clicked on frequently. Because we are paid only when users click on ads, the AdWords ranking system aligns our interests with those of our advertisers and our users. The more relevant and useful the ad, the better for our users, for our advertisers and for us.

The AdWords auction system also incorporates the AdWords Discounter, which automatically lowers the amount advertisers actually pay to the minimum needed to maintain their ad position. Consider a situation where there are three advertisers—Pat, Betty and Joe—each bidding on the same keyword for ads that will be displayed on Google.com. These advertisers have ads with equal click-through rates and bid $1.00 per click, $0.60 per click and $0.50 per click, respectively. With our AdWords discounter, Pat would occupy the first ad position and pay only $0.61 per click, Betty would occupy the second ad position and pay only $0.51 per click, and Joe would occupy the third ad position and pay the minimum bid of $0.01 per click. The AdWords discounter saves money for advertisers by minimizing the price they pay per click, while relieving them of the need to constantly monitor and adjust their cost-per-click. Advertisers can also experience greater discounts through the application of our smart pricing technology, which can reduce the price of clicks for ads served across the Google Network based on the expected value of the click to the advertiser.

AdSense Contextual Advertising Technology. Our AdSense technology employs techniques that consider factors such as keyword analysis, word frequency and the overall link structure of the web to analyze the content of individual web pages and to match ads to them almost instantaneously. With this ad targeting technology, we can automatically serve contextually relevant ads. To do this, Google Network members embed a small amount of custom HTML code on web pages that generates a request to Google’s AdSense service whenever a user views the web page. Upon receiving a request, our software examines the content of web pages and performs a matching process that identifies advertisements that we

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believe are relevant to the content of the specific web page. The relevant ads are then returned to the web pages in response to the request. We employ similar techniques for matching advertisements to other forms of textual content, such as email messages and Google Groups postings. For example, our technology can serve ads offering tickets to fans of a specific sports team on a news story about that team.

Our display advertising programs provide advertisers and publishers services related to the delivery of branded display advertising. The key elements of our display advertising technology include:

DoubleClick Advertiser Platform. The DoubleClick Advertiser Platform provides tools for media planning, buying, selling, ad delivery, measurement, and optimization. The key technologies included in this platform are:

DoubleClick Publisher Platform. The DoubleClick Publisher Platform provides tools that address key challenges throughout the publisher ad sales cycle and helps maximize the value of publisher content. The key technologies included in this platform are:

YouTube. YouTube offers video ads solutions to advertisers that provide advertisers with a way to promote their content to the YouTube community as well as to associate themselves with content being watched by their target audience. YouTube offers analytic tools to help advertisers understand their audience and derive general business intelligence. The key solutions provided by YouTube include:

The Technology Behind Google’s Advertising Programs

Our AdWords and AdSense programs serve millions of relevant, targeted ads each day based on search terms people enter or content they view on the web. The key elements of our advertising technology include:

Google AdWords Auction System. The Google AdWords auction system lets advertisers automatically deliver relevant, targeted advertising. Every search query we process involves the automated execution of an auction, resulting in our advertising system often processing hundreds of millions of auctions per day. To determine whether an ad is relevant to a particular query, this system weighs an advertiser’s willingness to pay for prominence in the ad listings (the cost-per-click or cost-per-impression bid) and interest from users in the ad as measured by the click-through rate and other factors. Our Quality-based Bidding system also assigns minimum bids to advertiser keywords based on the Quality Scores of those keywords—the higher the Quality Score, the lower the minimum bid. The Quality Score is determined by an advertiser’s keyword click-through rate, the relevance of the ad text, historical keyword performance, the quality of the ad’s landing page and other relevancy factors. This prevents advertisers with irrelevant ads from “squatting” in top positions to gain exposure, and rewards more relevant, well-targeted ads that are clicked on frequently. Because we are paid only when users click on ads, the AdWords ranking system aligns our interests with those of our advertisers and our users. The more relevant and useful the ad, the better for our users, for our advertisers and for us.

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The AdWords auction system also incorporates the AdWords Discounter, which automatically lowers the amount advertisers actually pay to the minimum needed to maintain their ad position. Consider a situation where there are three advertisers—Pat, Betty and Joe—each bidding on the same keyword for ads that will be displayed on Google.com. These advertisers have ads with equal click-through rates and bid $1.00 per click, $0.60 per click and $0.50 per click, respectively. With our AdWords discounter, Pat would occupy the first ad position and pay only $0.61 per click, Betty would occupy the second ad position and pay only $0.51 per click, and Joe would occupy the third ad position and pay the minimum bid of $0.01 per click. The AdWords discounter saves money for advertisers by minimizing the price they pay per click, while relieving them of the need to constantly monitor and adjust their CPCs. Advertisers can also experience greater discounts through the application of our smart pricing technology, which can reduce the price of clicks for ads served across the Google Network based on the expected value of the click to the advertiser.

AdSense Contextual Advertising Technology. Our AdSense technology employs techniques that consider factors such as keyword analysis, word frequency and the overall link structure of the web to analyze the content of individual web pages and to match ads to them almost instantaneously. With this ad targeting technology, we can automatically serve contextually relevant ads. To do this, Google Network members embed a small amount of custom HTML code on web pages that generates a request to Google’s AdSense service whenever a user views the web page. Upon receiving a request, our software examines the content of web pages and performs a matching process that identifies advertisements that we believe are relevant to the content of the specific web page. The relevant ads are then returned to the web pages in response to the request. We employ similar techniques for matching advertisements to other forms of textual content, such as email messages and Google Groups postings. For example, our technology can serve ads offering tickets to fans of a specific sports team on a news story about that team.