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

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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?

@PatrickCoffee Patrick Coffee is a senior editor for Adweek.