Google Has Gone 'Dark'

Google Just Ended A Bunch Of Free Data
and web marketing pros are flying blind. Read more 

Google Hummingbird update

Check out this article on Google's update called Hummingbird. This algorithm change, which was officially announced on September 26th, addresses conversational queries largely driven by mobile devices using voice search. Read the full article here:   
http://www.link-assistant.com/news/google-hummingbird-update.html