| 1 | January 28, 2011 | Attribution Update | 2% | Matt Cutts' Blog, Search News Central |
| 2 | February 23, 2011 | Panda 1.0 | 12% of US searches | Matt Cutts' Blog, Webmaster World, SEOmoz, Wikipedia, Search Engine Land |
| 3 | March 30, 2011 | Plus 1 Button | - | Google's Webmaster Central Blog, Search Engine Land |
| 4 | April 11, 2011 | Panda 2.0 | 2% of US searches | Google Webmaster Central Blog, Search Engine Land |
| 5 | May 9, 2011 | Panda 2.1 | Unknown | Search Engine Land |
| 6 | June 2, 2011 | Schema.org | Unknown | Search Engine Land, Google's Official Blog |
| 7 | June 21, 2011 | Panda 2.2 | Unknown | Search Engine Land 1, Search Engine Land 2 |
| 8 | June 28, 2011 | Google+ | - | Google's Official Blog |
| 9 | July 23, 2011 | Panda 2.3 | Unknown | Search Engine Land |
| 10 | August 12, 2011 | Panda 2.4 | 6% - 9% of searches | Google Webmaster Central Blog, Search Engine Land |
| 11 | September 28, 2011 | Panda 2.5 | Unknown | Search Engine Land |
| 12 | October 5, 2011 | Panda "Flux" | 2% of searches | Search Engine Land, Search Engine Watch |
| 13 | October 18, 2011 | Query Encryption | - | Google's Official Blog |
| 14 | November 3, 2011 | Freshness Update | 35% of searches | Google's Official Blog, Search Engine Land |
| 15 | November 14, 2011 | November Roundup - 10 Updates | Unknown | Google's Official Blog, Search Engine Land |
| 16 | November 18, 2011 | Panda 3.1 | 1% of searches | Search Engine Roundtable, Search Engine Land |
| 17 | December 1, 2011 | December Roundup - 10 Updates | Unknown | Google's Official Blog, Search Engine Land |
