For anyone who doesn’t look much at their analytics and isn’t familiar with the Not Provided phenomenon, this is happening because Google instituted a secure searching platform. Previously, all Google searches left a trail of what keywords were used in the search query, and this trail could be picked up in server log files and via web analytic programs. With the new secure searching, Google is blocking the search queries from being shown when people who do Google searches are also logged into any Google product. It seems that they haven’t been blocking them all, but blocking more and more every week. In addition, the Firefox browser recently announced that they’ll also be blocking all search queries. It can be assumed that the Chrome browser will soon start doing the same thing.