After teasing us for many months, Google has finally confirmed Penguin is running again. But this time, as part of the core algorithm.
Importance: For all webmaster and SEO's.
Recommended Link: Google Webmaster Central Blog || SEO Guide
What is Penguin?
First announced way back in April 2012, the update was introduced as a way of tackling black-hat SEO techniques that were being used to artificially boost the rankings of a page. It particularly looked to target companies and agencies who were buying and obtaining links through link networks.
It impacted approximately 3.1% of search queries in English, and resulted in some high profile sites falling down the search engine results page (SERPs), some even dropping off completely.