Google AdSense is a program provided by Google that allows website publishers to display targeted advertising based on user interests, behaviors, and location. It provides a revenue model for web content creators, enabling them to earn money from displaying ads while maintaining control over their site's appearance and content. Google AdSense uses data collected from users' browsing behavior to serve more relevant ads, enhancing the effectiveness of the advertising experience. The program is designed to offer a balance between earning potential and maintaining a professional online presence.