Nielsen's $2 billion DoubleVerify acquisition is a big play for CMOs

Nielsen's planned purchase of Mark Zagorski's DoubleVerify is a move to deepen its advertiser-direct customer base. Stewart Cook/Variety/Penske Media via Getty Images A version of this post appears in the CMO Insider newsletter. Sign up for Business Insider's weekly marketing newsletter. CMOs: Get ready to field more sales pitches from Nielsen. The TV ratings giant surprised the ad industry by announcing plans to buy DoubleVerify for $2.15 billion — and sent chins wagging with hot takes about…