Personal Blocklist by Google

Want to get rid of spammy site - Check out Personal Blocklist by Google itself which has 84% of sites in its new Google Panda update.

Most of the Google Panda updates are based on Feedback received to Google through various source which also includes Google's own "Personal Blocklist Chrome extension", which Google launched last week. Google compared the Blocklist data gathered with the sites identified by their algorithm and were very pleased that the preferences Google users expressed by using the Google's Personal Blocklist chrome extension are well represented. Google stated in its blog - "If you take the top several dozen or so most-blocked domains from the Chrome extension, then this algorithmic change addresses 84% of them, which is strong independent confirmation of the user benefits."

Google is very excited about this new ranking improvement because as it is a big step in the right direction of helping people find ever higher quality in Google search results. Google have been tackling these issues for more than a year now and working on this specific change for the past few months and continues working on many more updates that believed to be substantially improve the quality of the pages in Google search results.

Source - Google Blog