Start in March 2010, i noticed there is a new thing call Google Starred Results, which appears at the top my my google search result.
 Google Starred Search Results

What is it? Here is what Google said:

 “Today we’re announcing a new feature in search that makes it easier for you to mark and rediscover your favorite web content — stars.

 

With stars, you can simply click the star marker on any search result or map and the next time you perform a search, that item will appear in a special list right at the top of your results when relevant. That means if you star the official websites for your favorite football teams, you might see those results right at the top of your next search for [nfl].”

 
Link: http://googleblog.blogspot.com/2010/03/stars-make-search-more-personal.html
  • Google Starred only appear for Google Account Sign-in users
  • If you click on the star, it will add the starred link to your Google Bookmark http://www.google.com/bookmarks