Google launched the Publisher Center in Google Ad Planner that allow you to provide details about your sites to help attract advertisers. Though the Publisher Center is only available in English at this time, any publisher can use the tool. The Google Ad Planner Publisher Center enables publishers to contribute directly to the site data provided in Google Ad Planner. Website owners can specify their site descriptions, content categories, supported ad formats and sizes, and share their Google Analytics traffic data in Google Ad Planner.

More info: Google AdSense blog | Video