In the Google AdWords Campaigns and Keywords reports, you can select Ad Distribution Network as a secondary dimension to identify visits that originate from three different channels within AdWords:
• search engine results pages (SERPs) directly on Google
• search engine results pages (SERPs) on Google partner sites (such as AOL)
• AdSense ads (displayed within any site belonging to the “Content Network”
Is one channel achieving higher conversion rates or Ecommerce revenue? You can adjust your AdWords campaigns accordingly.