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Yesterday, 11% of websites affected by Google Panda(Google Farmer) update 2.5. Some popular websites or blogs lost their traffic up to 90% and also their revenue. Then, what is Google panda or Google Farmer.

Google Panda or Google Farmer is a search algorithm introduced and used by Google to improve Internet search results since February 2011. The change aims to lower the rank of low quality sites in search results and return high quality sites to Google’s users. Google stated that, almost 12% of Google search results were affected by Google Panda. Checkout this detailed list of websites published by Sistrix, that were possibly the top losers in this ongoing war between Google and content farms

The Google Search Algorithms

Google changes their search algorithm constantly because, it will never be perfect and also to prevent someone from discovering the magic formula that allows to develop a site for the sole purpose of arriving at the top of the results. Let’s checkout the Google’s major search algorithm update history list below.

NoAlgorithm nameIntroduced
1FritzSummer 2003
2FloridaNovember 2003
3Austin UpdateJan 2004
4The SandboxMay 2005
5BourbonOctober 2005
6Big DaddyOctober 2005
7SupplementalJan 2007
8Paid LinksOctober 2007
9Dewey UpdateMar 2008
10Vince / BrandMarch 2009
11May DayMay 2010
12CaffeineJune 2010
13Scraper FilterJan. 2011
14PandaFebruary 2011

Differences Between Panda and Previous Algorithms

Human quality testers rated thousands of websites based on trustworthiness, quality of content, design, etc. and also the speed of the website. The Panda, used to look for similarities between websites people found to be low and high quality. Panda takes into account user behavior patterns, gained either through the Google Toolbar or through user behavior at SERPs (Search Engine Result Pages). Many new ranking factors have been introduced to the Google algorithm as a result, while older ranking factors like PageRank have been downgraded in importance. Google Panda appears to impact an entire site’s ranking, rather than just the individual pages on a site.

The Google Panda updates

Google is running Panda update every four to seven weeks. Check out the full list of Panda update dates below.

NoDate of UpadtaionAffected
124 Feb 2011USA only
211 April 2011All English language results
310 May 2011
416 June 2011
523 July 2011
612 August 2011All languages results
728 Sept 2011

If your site cought by the Panda then you have to wait for the next update. There is nothing for you to worry about, if your site is providing useful and relevant content to searchers. Always stay on the right track, and everything will be alright.