Google has been updating it’s search algorithm regularly for some years now, in it’s constant attempt to improve ranking accuracy and relevancy.
Rather like hurricanes the algorithms are named alphabetically.
The latest algo is named Penguin, launched in April 2012, in particular to weed out websites considered to be spamming its search results by buying links or obtaining them through link networks designed specifically to boost Google rankings. If you feel that your site might have some of these dubious links then you may want to use the Google disavow links tool, where you can inform Google of unwelcome links that could be affecting your ranking.
The algorithms prior to this were the Panda series, details of which are listed below. As you can see Google have been working hard on your behalf to keep the web as spam free as possible:
- Panda Update 1, Feb. 24, 2011
- Panda Update 2, April 11, 2011
- Panda Update 3, May 10, 2011
- Panda Update 4, June 16, 2011
- Panda Update 5, July 23, 2011
- Panda Update 6, Aug. 12, 2011
- Panda Update 7, Sept. 28, 2011
- Panda Update 8, Oct. 19, 2011
- Panda Update 9, Nov. 18, 2011:
- Panda Update 10, Jan. 18, 2012
- Panda Update 11, Feb. 27, 2012
- Panda Update 12, March 23, 2012
- Panda Update 13, April 19, 2012
- Panda Update 14, April 27, 2012:
- Panda Update 15, June 9, 2012:
- Panda Update 16, June 25, 2012:
- Panda Update 17, July 24, 2012:
- Panda Update 18, Aug. 20, 2012:
- Panda Update 19, Sept. 18, 2012:
- Panda Update 20 , Sept. 27, 2012
- Panda Update 21, Nov. 5, 2012
- Panda Update 22, Nov. 21, 2012
- Panda Update 23, Dec. 21, 2012
- Panda Update 24, Jan. 22, 2013
- Panda Update 25, March 15, 2013
