Meet the PR firms challenging the giants

Hi and welcome to Insider Advertising for May 24. I'm senior advertising reporter Lauren Johnson, and here's what's going on:Check out the PR firms challenging the giants.Meet David Zaslav.Marketing tech startup Key raises $3 million.If this email was forwarded to you, sign up here for your daily insider's guide to advertising and media.Tips, comments, suggestions? Drop me a line at LJohnson@insider.com or on Twitter at @LaurenJohnson.
Barbara Bates, global CEO of Hotwire
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