Panda Update and Penguin Update

when the first google panda update was came on feb 24 2011 everyone was surprised due to search engine ranking results of their website keywords.then they tried to follow the google panda updated algorithm.panda update is been made to reduce the low qualty sites from the google search results.panda update affected the sites which contains the low qualty content on their pages.In simple way we can say that panda update was the penalty for those website owners who tried to put duplicate content on their websites.here is the updated list of panda updates:-

- Panda 1.0 February 24th 2011

- Panda 2.0 April 11th 2011.

- Panda 2.1 May 9th 2011 or so

- Panda 2.2 June 18th 2011 or so.

- Panda 2.3 around July 22nd 2011.

- Panda 2.4 August 2011

- Panda 2.5 September 28th 2011

- Panda 2.5.1 October 9th 2011

- Panda 2.5.2 October 13th 2011

- Panda 2.5.3 October 19/20th 2011

- Panda 3.1 November 18th 2011

- Panda 3.2 about January 15th 2012

- Panda 3.3 about February 26th 2012

- Panda 3.4 March 23rd 2012

- Panda 3.5 April 19th 2012

- Panda 3.6 April 27th 2012

- Panda 3.7 June 8th 2012

- Panda 3.8 June 25th 2012

- Panda 3.9 July 24th 2012

- Panda 3.9.1 August 20th 2012

- Panda 3.9.2 September 18th 2012

- Panda Update 20 September 27 2012

- Panda #21 November 5th 2012

- Panda #22 December 4th 2012

- Panda #23 December 21st 2012

- Panda #24 Jan. 22nd 2013

while penguin update is an important algorithm change targeted at webspam.If you noticed major traffic losses between April 24th and April 25th, chances are Penguin is the culprit because panda was also came at same time.There can be several reasons of penguin update:-

1. Aggressive exact-match anchor text

2. Overuse of exact-match domains

3. Low-quality article and blogs

4. Keyword stuffing