AdSense today celebrating its 10th anniversary. Google had on June 18, 2003, launched a the self-service program that enables website publishers to serve ads precisely targeted to the specific content of their individual web pages.
"The self-service option augments the existing content targeting services for publishers announced by Google in March 2003, now making this service available to a broader universe of high-quality websites," Google stated at the time of launch.
"With Google AdSense, publishers serve text-based Google AdWords ads on their site and Google pays them for clicks on these ads - users benefit from more relevant ads and publishers can maximize the revenue potential of their websites."
Fast-forward ten years, AdSense now a core part of Google's advertising business has a community of "over two million publishers, and helped publishers earn over $7 billion last year alone."