The New CEO of the World’s Biggest Ad-Buying Firm Explains Why Agencies Should Never Own Customer Data
GroupM's Christian Juhl talks Google and impartiality
WPP's data strategy is at odds with rivals IPG and Publicis.
GroupM
Can an agency buying ads for some of the world’s biggest advertisers simultaneously own a firm that specializes in gathering consumer data to help target those clients’ ads via assorted platforms and publishers?
