Facebook And GroupM Tussle On Third-Party Viewability Verification
The fox can’t guard the chicken run. GroupM is not down with Facebook and Google’s reticence around third-party verification tags. “You can’t measure yourself,” said John Montgomery, COO of GroupM Interaction, North America, speaking at AdExchanger’s Clean Ads I/O conference in New York City on Wednesday. The fact that Facebook is working closely with the […]
