It was 12 years ago today that Google launched the Panda update. Websites impacted by the Google Panda Update were downgraded algorithmically. But Google doesn’t consider downgrading rankings for a website algorithmically as a “penalty.”Why was Google Panda launched? Google Panda algorithm explained: how it workedMuch speculation followed the arrival of Google Panda. Here's Search Engine Land's coverage of Panda, from 2011 to 2016:Feb. 23, 2011: Panda Update 1.0April 11, 2011: Google Panda Update 2.0May 9, 2011: Panda Update 2.1June 21, 2011: Panda Update 2.2July 23, 2011: Panda Update 2.3Aug. 12, 2011: Panda Update 2.4Sept. 28, 2011: Panda Update 2.5Oct. 19, 2011: Panda Update 3.0Nov. 18, 2011: Panda Update 3.1Jan. 18, 2012: Panda Update 3.2Feb. 27, 2012: Panda Update 3.3March 23, 2012: Panda Update 3.4April 19, 2012: Panda Update 3.5April 27, 2012: Panda Update 3.6June 8, 2012: Panda Update 3.7June 25, 2012: Panda Update 3.8July 24, 2012: Panda Update 3.9Aug. 20, 2012: Panda Update 3.9.1Sept. 18, 2012: Panda Update 3.9.2Sept. 27, 2012: Panda Update #20Nov. 5, 2012: Panda Update #21Nov. 21, 2012: Panda Update #22Dec. 21, 2012: Panda Update #23Jan. 22, 2013: Panda Update #24March 14, 2013: Panda Update #25July 18, 2013: Panda Update #26May 20, 2014: Panda Update 4.0Sept. 23, 2014: Panda Update 4.1July 17, 2015: Panda Update 4.2