Google launched its Adsense program originally named content targeting advertising in March 2003 the Adsense name was originally used by applied semantics a competitive offering to Adsense the name was adopted by Google after google acquired applied semantics in April 2003

Google Adsense is a program run by Google through which website publishers in Google network of content sites serve text images video or interactive media advertisements that are targeted to the site content and audience they can generate revenue on either a per click or per impressions basis now every website requires a google Adsense to monetise its site it’s the most popular website now for websites