Matt Cutts explains the “Disavow links” feature of Google Webmaster Tools.

Learn more about how to use the disavow links feature on our blog and in our Help Center:

http://googlewebmastercentral.blogspot.com/2012/10/a-new-tool-to-disavow-links.html

http://support.google.com/webmasters/bin/answer.py?hl=en&answer=2648487

Access the feature here:

https://www.google.com/webmasters/tools/disavow-links-main

More webmaster resources:

http://www.google.com/webmasters/