Now that Hummingbird has been around for a little while now, we know that there are some pretty big differences between this update when compared to Penguin and Panda. Because of Hummingbird’s new algorithm, it changes how Google understands the search queries it’s given and what it finds on the web pages it crawls.
In today’s Whiteboard Friday by Moz, Rand explains the effects of long-tail searches, and how they will continue to evolve.
http://moz.com/blog/google-is-changing-long-tail-search-with-efforts-like-hummingbird-whiteboard-friday