Advertising Age Article Abstract
Online Ad Cops Aiming to Tame Tier-Two Inventory for Brands
A Mini-Industry of Verification Services Looks to Weed Out Waste and Fraud
NEW YORK (AdAge.com) -- As more brands shift to buying audiences online rather than buying specific sites, a mini industry of verification services has sprung up to ensure the ads that are increasingly placed through ad networks and exchanges are appearing where they're supposed to. ...