In the Upfront, GroupM Is Sticking With Nielsen for Now, but It’s Testing iSpot, Comscore, VideoAmp for the Future Insights Jun 6 Written By Guest User iSpotNextTV Guest User
In the Upfront, GroupM Is Sticking With Nielsen for Now, but It’s Testing iSpot, Comscore, VideoAmp for the Future Insights Jun 6 Written By Guest User iSpotNextTV Guest User
