Have you been working very hard to create quality content and a usable, fast website and invested a lot of time to rank for certain keywords? It’s a LOT of work, we get it! And every time Google releases a Core Update, that just might change. For better or worse!
Google recently in fact just confirmed on December 3rd. As usual with core updates, the impact is expected to be significant, but no specific changes have been revealed. More information from Google’s Search Liason can be found on Twitter.