Every one know whats happening around the SEO world, here i would like to share the algorithms used by Google and what is the reason for it has been created. Algorithms splits mainly into 3 types, Namely:
Google Panda: Its is a change to Google's search results ranking algorithm that was first released in February 2011. The change aimed to lower the rank of "low-quality sites" or "thin sites" and to return back the top results. more..
Panda's Update in SEO and It's History :
First update released on Feb. 24, 2011 with the features of updating the language with the 11.8% of queries; for more Details of SEO History of Panda. And the recent version of Panda released with the version 4.1 named slow rollout.
Google Penguin:Its is code name for the algorithm update for reducing the search engine ranking of the websites which violets the Google Webmaster guidelines.
Penguins update takes place in the following dates with diffrent versions as follows,
Penguin 1 on April 24, 2012 (impacting around 3.1% of queries)
Penguin 2 on May 26, 2012 (impacting less than 0.1%)
Penguin 3 on October 5, 2012 (impacting around 0.3% of queries)
Penguin 4 (AKA Penguin 2.0) on May 22, 2013 (impacting 2.3% of queries)
Penguin 5 (AKA Penguin 2.1) on October 4, 2013 (impacting around 1% of queries)
Note: Next update will be coverd by Oct 3rd Week 2014.
Google Hummingbird:Humminbird introduced completly to focus on its search algorithm and two increase the search related to its local searches and also it imapacts more than 90% global searches intro of Hummingbird, the value of content marketing has gone higher than ever. It was introduced in 30 Aug 2013.
Removing the concept of organic search keywords data, the search engine has made it pretty clear that we, as marketers, have to understand the questions a searcher have or may have later regarding a product or service, not keywords.