Google has released the Google +1 button.
Webmasters can add the +1 button to their site and allow visitors to give recommendation to Google and let others know.
What is Google +1 button
The +1 button is similar to the “Like” button from Facebook. It lets other know “this is pretty cool” or “you should check this out”. +1 can help friends and others to find the best stuff.
To integrate +1 button
Integrate +1 button is easy. You only have some basic knowledge of HTML, and do not need any progamming knowledge.