It's that time again. Google's Penguin 3.0 update has officially rolled out after about a year of silence, and the reactions so far have been mixed. Webmasters and SEOs will likely be doing one of three things as the update takes effect: enjoying a surge in rankings due to a clean link profile, seeing no change in traffic, or scrambling to fix low-quality links.
Fixing spammy links involves either contacting the webmasters that are linking to you or using Google's disavow tool. Unfortunately, despite much discussion, Google has failed to make it clear when people should actually disavow links.