What You Need To Know About Google’s Panda & Penguin Update
Google Panda Update (aka Farmer Update) was an algorithm update by Google to filter low quality websites and spam. It was a site wide penalty to remove poor quality content from Google search engine results pages (SERPs) and to provide higher rankings for high quality websites – sites with original content, in-depth analysis etc. The first Google Panda Update was on February 24, 2011 which targeted content farms (sites with poor content)
Google Penguin Update (or Over Optimization Penalty) targeted websites that engaged in webspam tactics (Black Hat SEO) to manipulate search engine rankings. Those sites were ‘overly optimized’ with keyword stuffing (refers to the practice of loading a webpage with keywords to manipulate a site’s search engine rankings) and aggressive usage of keywords in anchor texts.