I just got an email on my WMT from Google saying the following:
http://www.your-site/: Unnatural inbound links
December 15, 2013
Google has detected a pattern of artificial or unnatural links pointing to your site. Buying links or participating in link schemes in order to manipulate PageRank are violations of Google's Webmaster Guidelines. As a result, Google has applied a manual spam action to your-site.com/. There may be other actions on your site or parts of your site.
So, my question is how do I look for this unnatural links and disavow them so, I can submit to "Request a Review" so, they remove this "manual spam action" from my domain, also what the hell that means?