(Not an ad, The +1 button and recommendations will appear at the bottom of display ads.)
In October, Google will make the ability for AdSense publishers to incorporate +1 buttons into display ads public. For example, if someone sees an ad that offers something they enjoy, they can click the +1 button to share with their friends they like it. If their friends and contacts are logged in, they will see their friends who have +1 the ad (as seen above).
This new addition to advertising is bound to spark much more relevance in ads, and actually make them more enjoyable for users. Users can see what their friends enjoy, and in the end they will probably like it too. As always, if AdSense publishers don’t want a +1 button on their ad, they can opt out.