Google Algorithm Changes
Google Algorithm keeps on changing about 500-600 times every year and many of these changes are minor and brings out only some changes. Very rarely does Google bring out major algorithmic changes and some of those updates are Google Panda and Google Penguin and these sorts of changes will bring significant results also. A proper study through the dates of the Google updates will help in bringing a lot of website traffic and improving the search engine rankings.
2013 Google Algorithm Updates
Penguin 2.1 was the Google update that was launched in October 4, 2013 after a gap of 4 and a half months. This update was a minor change and made a moderate impact.
Hummingbird was another Google update that was announced on September 26th, but this was the update that was rolled out on August 20, 2013. This Google algorithm can be compared to the Caffeine and this is the core algorithm that brought great changes to the semantic search and for the knowledge graph.
2012 Google Algorithm Updates
Knowledge Graph Expansion was the algorithm update in December 4, 2012; this update was added to the non English queries such as for languages as French, German, Spanish, Russian, Italian, Portuguese and Japanese. This was basically a translation update and it also helped in enhancing the knowledge graph capabilities.
Panda #22 is the algorithm that contained mixed signals and later it was updated to have data only. This updated was named on November 21, 2012.
Panda #21 was rolled on after 5.5 weeks just after the update of Panda #20; even though this update was small it had 1.1% impact on the English queries.
2011 Google Algorithm Updates
December 10 pack good update was announced on December 1, 2011, this algorithm included the query refinements, blog search freshness, parked domain detection and image search freshness.
Panda 3.1 #9 update happen almost frequently and this update is almost minor and the series of panda update bought high impact changes, this algorithm was launched on November 18, 2011.