Facebook Just Made 2 Big Changes to Appease Advertisers on Viewability

Offers premium option and third-party verification

Brands have long lamented the possibility that Internet users don't actually see the ads they pay for. Well, Facebook today introduced a premium buying choice that should quell some of that unease, offering marketers the option to pay for ads only when the entire unit appears on a viewer's screen. 

@Chris_Heine Christopher Heine is a New York-based editor and writer.