Google users, you're about to become shills. A major update to the company's Terms of Service agreement today could have some users' profiles showing up in ads across the web. These "shared endorsements," as Google is calling them, leverage any reviews, comments, +1s, follows or stars a user may have given to a business or brand by effectively placing that user's name, photo and any relevant comment in a personalized advertisement. It's worth nothing, however, that if you've set restrictions on your shared comments, personalized ads will only be shown to friends within that Google+ circle
http://www.engadget.com/2013/10/11/google-users-shared-endorsements-ads/