Next in Media spoke with Dr. Mark Grether SVP & General Manager, PayPal Ads, on why he thinks the company's 'transaction graph' may be even more powerful than some retailers' data for advertising, and why there's nothing to worry about with a company that has so many people's banking information to use that data for ad targeting.

Live From Cannes with Google's Sean Downey

Everything we know about the media, marketing and advertising business is being completely upended thanks to technology and data. We're talking with some of the top industry leaders as they steer their companies through constant change.