Major Google SEO Updates & Algorithm Changes from 2009 to 2017

Google has a long history of famous algorithm updates, search index changes and refreshes.

2017 Updates

• Snippet Length Increase — November 30, 2017
• Featured Snippet Drop — October 27, 2017
• Chrome HTTPS Warnings — October 17, 2017
• Google Tops 50% HTTPS — April 16, 2017
• "Fred" (Unconfirmed) — March 8, 2017
• Intrusive Interstitial Penalty — January 10, 2017

2016 Updates

• Penguin 4.0, Phase 2 — October 6, 2016
• Penguin 4.0, Phase 1 — September 27, 2016
• Penguin 4.0 Announcement — September 23, 2016
• Image/Universal Drop — September 13, 2016
• "Possum" — September 1, 2016
• Mobile-friendly 2 — May 12, 2016
• AdWords Shake-up — February 23, 2016

2015 Updates

• RankBrain* — October 26, 2015
• Panda 4.2 (#28) — July 17, 2015
• The Quality Update — May 3, 2015
• Mobile Update AKA "Mobilegeddon" — April 22, 2015

2014 Updates

• Pigeon Expands (UK, CA, AU) — December 22, 2014
• Penguin Everflux — December 10, 2014
• Pirate 2.0 — October 21, 2014
• Penguin 3.0 — October 17, 2014
• "In The News" Box — October 1, 2014
• Panda 4.1 (#27) — September 23, 2014
• Authorship Removed — August 28, 2014
• HTTPS/SSL Update — August 6, 2014
• Pigeon — July 24, 2014
• Authorship Photo Drop — June 28, 2014
• Payday Loan 3.0 — June 12, 2014
• Panda 4.0 (#26) — May 19, 2014
• Payday Loan 2.0 — May 16, 2014
• Page Layout #3 — February 6, 2014

2013 Updates

• Authorship Shake-up  —  December 19, 2013
• Penguin 2.1 (#5)  —  October 4, 2013
• Hummingbird  —  August 20, 2013
• In-depth Articles  —  August 6, 2013
• Knowledge Graph Expansion  —  July 19, 2013
• Panda Recovery  —  July 18, 2013
• "Payday Loan" Update  —  June 11, 2013
• Panda Dance  —  June 11, 2013
• Penguin 2.0 (#4)  —  May 22, 2013
• Domain Crowding  —  May 21, 2013
• "Phantom"  —  May 9, 2013
• Panda #25  —  March 14, 2013
• Panda #24  —  January 22, 2013

2012 Updates

• Panda #23  —  December 21, 2012
• Knowledge Graph Expansion  —  December 4, 2012
• Panda #22  —  November 21, 2012
• Panda #21  —  November 5, 2012
• Page Layout #2  —  October 9, 2012
• Penguin #3  —  October 5, 2012
• Panda #20  —  September 27, 2012
• Exact-Match Domain (EMD) Update  —  September 27, 2012
• Panda 3.9.2 (#19)  —  September 18, 2012
• Panda 3.9.1 (#18)  —  August 20, 2012
• 7-Result SERPs  —  August 14, 2012
• DMCA Penalty ("Pirate")  —  August 10, 2012
• Panda 3.9 (#17)  —  July 24, 2012
• Link Warnings  —  July 19, 2012
• Panda 3.8 (#16)  —  June 25, 2012
• Panda 3.7 (#15)  —  June 8, 2012
• Penguin 1.1 (#2)  —  May 25, 2012
• Knowledge Graph  —  May 16, 2012
• Panda 3.6 (#14)  —  April 27, 2012
• Penguin  —  April 24, 2012
• Panda 3.5 (#13)  —  April 19, 2012
• Panda 3.4 (#12)  —  March 23, 2012
• Search Quality Video  —  March 12, 2012
• Panda 3.3 (#11)  —  February 27, 2012
• Venice  —  February 27, 2012
• Ads Above The Fold  —  January 19, 2012
• Panda 3.2 (#10)  —  January 18, 2012

2011 Updates

• Panda 3.1 (#9)  —  November 18, 2011
• Query Encryption  —  October 18, 2011
• Panda "Flux" (#8)  —  October 5, 2011
• Panda 2.5 (#7)  —  September 28, 2011
• Pagination Elements  —  September 15, 2011
• Expanded Sitelinks  —  August 16, 2011
• Panda 2.4 (#6)  —  August 12, 2011
• Panda 2.3 (#5)  —  July 23, 2011
• Google+  —  June 28, 2011
• Panda 2.2 (#4)  —  June 21, 2011
• Schema.org  —  June 2, 2011
• Panda 2.1 (#3)  —  May 9, 2011
• Panda 2.0 (#2)  —  April 11, 2011
• The +1 Button  —  March 30, 2011
• Panda/Farmer  —  February 23, 2011
• Attribution Update  —  January 28, 2011

2010 Updates

• Negative Reviews  —  December 1, 2010
• Social Signals  —  December 1, 2010
• Instant Previews  —  November 1, 2010
• Google Instant  —  September 1, 2010
• Brand Update  —  August 1, 2010
• Caffeine (Rollout)  —  June 1, 2010
• Google Places  —  April 1, 2010

2009 Updates

• Real-time Search  —  December 1, 2009
• Caffeine (Preview)  —  August 1, 2009
• Vince  —  February 1, 2009
• Rel-canonical Tag  —  February 1, 2009