Facebook publishes timely update on third-party verification as P&G's cry for transparency ripples through industry

As pressure mounts for online media owners to be open to third party measurement, Facebook has revealed a series of expansions to its third-party verification as well as its own viewability measurement programme and more cross-measurement tools. 
Facebook’s timing of this update is coincidental, to say the least.  
One of the world’s biggest advertisers P&G laid down the gauntlet this week when its top marketer Marc Pritchard said that he would no longer be satisfied wi