Google Penguin update came in April 2012. This algorithm is about to Restrict to rank bad quality Backlinks website in google search page. If Backlinks created against google guidelines then the website will affect and Drop Website ranking from Google.
Google Panda Algorithm Updates Google Panda Update came in Feb 2011. To Stop website ranking with poor or Duplicate Content. Google introduces Panda Update for filter ranking from the Duplicate content or Poor Quality content. If google found content more then one place, google marks Duplicate Content and it will affect and drop ranking.
Hummingbird google updates It’s the name of the new search algorithm that Google is using, one that Google says should return better results. “Hummingbird” is the name of the new search platform that Google is using as of September 2013 Hummingbird is paying more attention to each word in a query, ensuring that the whole query — the whole sentence or conversation or meaning — is taken into account, rather than particular words. The goal is that pages matching the meaning do better, rather than pages matching just a few words.