Google Penguin is a code name for a Google algorithm update that was first announced on April 24, 2012. The update is aimed at decreasing search engine rankings of websites that violate Google’s Webmaster Guideline by using now declared black-hat SEO techniques, such as keyword stuffing,[3] cloaking,participating in link schemes,deliberate creation of duplicate content,and others. Unlike PageRank, however, Google makes all updates to this algorithm public.
