Cannes TV: How do big brands get heard through the noise?

Everyone is searching for engaging content. That adds to the noise. So just how do the big brands make sure they get heard? How do you measure and just how do you learn?
In the concluding part of an exclusive panel from Cannes, Rachel Barnes, editor of Marketing, debates with Nina Bibby the marketing and consumer director at O2, Orla Mitchell, the CMO of Wrigley alongside AOL UK’s managing director and VP Hamish Nicklin.