AdSense

Google AdSense is a program run by Google that allows website publishers to serve targeted advertisements on their sites, generating revenue on a per-click or per-impression basis. The program uses Google's technology to serve ads based on website content, user location, and other factors, and is used by over 38 million websites. AdSense has become a popular way for small websites to generate revenue, and is particularly useful for content-rich websites. To display AdSense ads, webmasters place a JavaScript code on their website's pages, and can place multiple ads on a page as long as there is sufficient content. AdSense income is generated through a complex pricing model based on a Vickrey second price auction, with Google sharing 68% of revenue with content network partners.learn more on wikipedia