Google AdSense is an online advertising program developed by Google that allows website owners and content creators to earn money by displaying targeted ads on their web pages. This program uses a combination of contextual and personalized advertising to match ads with the content of a website, making it a popular choice for publishers looking to monetize their online content. With its user-friendly interface and customizable ad formats, Google AdSense offers a simple and effective way for website owners to generate revenue from their online presence.