From being a niche advertising sector not too long ago, mobile advertising has fast become the dominant digital advertising platform, says Rob Norman, Chief Digital Officer of GroupM Worldwide in this interview with Beet.TV   The rapid  transformation has been propelled by Facebook and Twitter, he explains.

The transformation to mobile provides new opportunities and challenges to marketers and their agencies, he notes.  Also in the interview he talks about the rise of “native advertising.”

We interviewed him during the Cannes Lions Festival at the MediaCom rooftop terrace of the Hotel Martinez.

Please find much more coverage of Cannes Lions on this page.