Because "algo" is much cooler than "algorithm" and there aren't enough infographics in the world (?) More info below graphic. Panda AKA The Common Sense Update 2011 with many follow up updates Google starts penalizing sites for keyword stuffing (getting as many keywords onto 1 page as possible), duplicate content, and thin (weak) content. PENGUIN AKA THE A LITTLE OUT OF YOUR CONTROL UPDATE 2012 Google says "nu-uh" to suspicious or spammy-looking links. Webmasters step up their game to avoid anchor text manipulation, keep an eye on incoming link patterns, and disavow spammy links fast. HUMMINGBIRD AKA THE GOOGLE'S GETTING SMARTER UPDATE 2012 Google search results begin showing pages that may not contain the exact keyword that was searched for. Machine learning starts picking up on user intent. PIGEON AKA THE BLURRED LINES UPDATE 2014 Google tightens up its algorithm, making its local and core algorithms more in line with eachother than before. MOBILE AKA "MOBILEGEDDON" 2012 Google makes the obvious announcement that more people are using their phones to search than ever before, and the unobvious announcement that they will penalize sites that are not mobile-friendly. … Continue reading Google Algo Updates, Explained.