In the coming weeks, your search results and ads on Google will include a +1 button, which users can click to recommend your ads. You don’t need to make any changes to your account in order to take advantage of them. The final landing page URL of your ads can also appear on the Google profile of any user who +1’s your ad.

Let us know if you are keen to setup a google +1 button.

http://www.google.com/+1/button/