The issue of transparency in digital advertising is complicated. How can brands and advertisers be confident that ad spend is being used efficiently by various platforms and intermediaries? What role does regulation play in driving accountability in ad spend? Are new technologies, such as the blockchain, the solution to ensure full transparency? This session to provide answers to some of these questions.

Guests: Aaron Bell, AdRoll; Tim Cadogan, OpenX; Joe Lazauskas, Contently