| No | Date | Update | Noticeable effect | References |
|---|---|---|---|---|
| 1 | January 18, 2005 | NoFollow Attribute | Unknown | Google Official Blog, Search Engine Watch |
| 2 | February 02, 2005 | Allegra Update | Unknown | Search Engine Watch, Webmaster World |
| 3 | May 20, 2005 | Bourbon Update | Unknown | Search Engine Roundtable, Webmaster World |
| 4 | June 02, 2005 | Google Sitemaps | Unknown | Search Engine Watch |
| 5 | June 28, 2005 | Personalized Search | Unknown | Google Official Blog, Search Engine Watch |
| 6 | September 08, 2005 | Gilligan Update | Unknown | Search Engine Watch, Matt Cutts |
| 7 | October 06, 2005 | Google Local and Maps | Unknown | Google Press Release |
| 8 | October 19, 2005 | Jagger Update | Unknown | Search Engine Journal, Webmaster World, Search Engine Roundtable |
| 9 | November 01, 2005 | Big Daddy Update | Unknown | Matt Cutts, Webmaster World, SEO Moz |
