AdSense is a program run by Google that allows website publishers in the Google Network of content sites to serve automatic text, image, video, or interactive media advertisements that are targeted to site content and audience. These advertisements are administered, sorted, and maintained by Google. Website owners can sign up for AdSense to enable ads on their sites, and they earn revenue when visitors interact with or view these ads. AdSense is one of the most popular methods for website monetization due to its ease of use and integration.