Google Search Algorithm Changes Documented - From Boston in 2003 to Panda 2.3

SEOmoz announced their first "living document", a complete history of named Google algorithm changes, from "Boston" in 2003 to Panda 2.3. "While Google makes hundreds of changes every year, Panda has proven once again that the major updates do matter to businesses, and it's useful to know when the rules changes on a large scale. […]

SEOmoz announced their first "living document", a complete history of named Google algorithm changes, from "Boston" in 2003 to Panda 2.3.

"While Google makes hundreds of changes every year, Panda has proven once again that the major updates do matter to businesses, and it's useful to know when the rules changes on a large scale. Within each year, you'll see a breakdown like this, complete with description and links," said Dr. Pete.

"For 2003-2010, updates are listed by month only. For 2011 changes (and going forward), we've provided exact dates, when possible. Some of these are estimates, but we want to try to isolate changes as precisely as we can, so that you can map them against their SEO impact on your own sites," Pete added.

To compile the list, SEOmoz has pulled a lot of this data from this WebmasterWorld thread, which has always done a great job of documenting Google updates.

SEOmoz did it with style in this graphical document:

SEOmoz Google Update List:

  • Google Toolbar - December 2000
  • Boston - February 2003
  • Cassandra - April 2003
  • Dominic - May 2003
  • Esmerelda - June 2003
  • Fritz - July 2003
  • Florida - November 2003
  • Austin - January 2004
  • Brandy - February 2004
  • Google IPO - August 2004
  • Nofollow - January 2005
  • Allegra - February 2005
  • Bourbon - May 2005
  • XML Sitemaps - June 2005
  • Personalized Search - June 2005
  • Gilligan - September 2005
  • Google Local/Maps - October 2005
  • Jagger - October 2005
  • Big Daddy - December 2005
  • Supplemental Index - November 2006
  • Universal Search - May 2007
  • Buffy - June 2007
  • Dewey - April 2008
  • Google Suggest - August 2008
  • Vince - February 2009
  • Rel-canonical Tag - February 2009
  • Caffeine - August 2009
  • Real-time Search - December 2009
  • Google Places - April 2010
  • May Day - May 2010
  • Brand Update - August 2010
  • Google Instant - September 2010
  • Instant Previews - November 2010
  • Social Signals - December 2010
  • Overstock.com Penalty - January 2011
  • Panda/Farmer - February 23, 2011
  • The +1 Button - March 30, 2011
  • Panda 2.0 - April 11, 2011
  • Panda 2.1 - May 9, 2011
  • Schema.org - June 2, 2011
  • Panda 2.2 - June 21, 2011
  • Google+ - June 28, 2011
  • Panda 2.3 - July 23, 2011

You can visit the SEOmoz's Google Algorithm Change History page here.

[Source: SEOmoz]