Author: Google

The Recommendation gadgets allow site visitors and members to find and recommend the most interesting content on your site. By placing recommendation buttons on articles or products on your site, visitors can recommend specific content which will then appear in the recommendation list for other visitors to find.

A little tip:

If you're using it a dotnetnuke blog module, you are probably able to replace the link anchor, google will generate for you with the page title. In this ventrian module I'm replacing "product one" (google's default) with the page title token.

Enjoy!