More change is coming to the advertising world! Facebook recently advised advertisers that a “clear history” tool will start affecting them in the second half of 2019. Facebook announced this during their latest quarterly call with Wall Street analysts. David Wehner, Facebook's CFO, said Europe's data rules have led to more people opting out of online tracking, which could be an indication of what's to come in the U.S. "The number of people who have opted out of using contex