How does Google target ads to my website?

Google automatically delivers ads that are targeted to your content or audience. We do this in several ways:

• Contextual targeting
  Our technology uses such factors as keyword analysis, word frequency, font size, and the overall link structure of the web, in order to determine what a webpage is about and precisely match Google ads to each page.
  
  
• Placement targeting
  With placement targeting, advertisers choose specific ad placements, or subsections of publisher websites, on which to run their ads. Ads that are placement-targeted may not be precisely related to the content of a page, but are hand-picked by advertisers who've determined a match between what your users are interested in and what they have to offer.
  
  
• Interest-based advertising
  Interest-based advertising enables advertisers to reach users based on their interests (e.g. 'sports enthusiasts'), and allows them to show ads based on a user's previous interactions with them, such as visits to advertiser websites. To complement interest-based advertising, the Ads Preferences Manager lets users view and edit their interest categories.
  

Our technology can also determine the primary language of a page. If your content is in a language supported by our program, AdSense will target ads in the appropriate language to your content. In addition, Google ads are geotargeted to your visitor's location.