AdSense
AdSense is an advertising program from Google. It displays ads on pages for which the ad’s Keywords match the keywords on the page. The program is aimed at website owners who wish to generate income from the site and who are paid by Google for each time the ad is clicked (or, in some cases, for each impression). The ads may consist of words, images, or video streams, or any combination of both.
AdWords is Google’s program for PPC advertising. The two programs intersect when Google provides a PPC Ad to a 3rd party site and pays it a fee.

