What is Adsense for domains?
Adsense for domains is a service where you point your parked domain to Google and Google will place ads on your domain name. You earn revenue when someone clicks on any of the links on your site.
How do I sign up for Adsense for domains?
Visit http://www.google.com/domainpark/ and apply for the Google Adsense for Domains program, when you are accepted, you need to point your domain to Google’s servers.