Official Google Blog: Using data to fight webspam
Rated • 1 review • science • blogspot.com
From the page: "
As the head of the webspam team at Google, I'm in charge of making sure your search results are as relevant and informative as possible. Webspam, in case you've never heard of it, is the junk you see in search results when websites successfully cheat their way into higher positions in search results or otherwise violate search engine quality guidelines. If you've never seen webspam, here's a good example of what you might see if you click on a link in the search results that's spam (click on the image to see it larger)."
