Adsense

AdSense is an ad serving application run by Google Inc. Website owners can enroll in this program to enable text, image, and videoadvertisements on their websites. These advertisements are administered by Google and generate revenue on either a per-click or per-impression basis. Google beta tested a cost-per-action service, but discontinued it in October 2008 in favor of a DoubleClick offering (also owned by Google). In Q1 2010, Google earned US$2.04 billion ($8.16 billion annualized), or 30% of total revenue, through AdSense.
Google AdSense is a free program that empowers online publishers to earn revenue by displaying relevant ads on a wide variety of online content, including:
Websites
Display ads on your website that are suited to your audience’s interests, and earn from valid clicks or impressions.
Mobile webpages and apps
Connect your mobile users with the right ad at the right time as they seek information on the go.
Site search results
Easily add a custom search engine to your site, and earn from ads on the search results pages.
Feeds
Display targeted ads in your RSS feeds, wherever they’re viewed.
Google AdSense is a free program that empowers online publishers to earn revenue by displaying relevant ads on a wide variety of online content, including:
Websites Display ads on your website that are suited to your audience’s interests, and earn from valid clicks or impressions.
Mobile webpages and apps Connect your mobile users with the right ad at the right time as they seek information on the go.
Site search results Easily add a custom search engine to your site, and earn from ads on the search results pages.
Feeds Display targeted ads in your RSS feeds, wherever they’re viewed.
Adsense