When Google makes a major change to their algorithm, they often give it a name. In April 2012, Google made a major update to their organic search ranking algorithm dubbed “Penguin.” The target of Google’s Penguin update is… wait for it… webspam! The likely targets of the update – sites violating Google’s Webmaster Quality Guidelines (sites participating in keyword stuffing, link schemes, and various other types of over-optimization).

Google Penguin Update / Release History

Other Helpful Links:

SEO FAQs
SEO Blog
SEO Services
Has Your Site Been Penalized?