Google announced policy change for advertisement that turns users into product pitchmen include Google+ users’ faces, names and comments in ads. However you can turn it off with simple setting below:
1. Go to settings page in Google+ accounts, scroll down until see the bold letters “Shared Endorsements”.
2. In Shared Endorsements, click Edit and then uncheck the box next to “Based upon my activity.
Note: Google may show name and profile photo in shared endorsements which will appear in advertisement.
3. Once uncheck the box, click Save and click Continue to complete the settings.