When it involves advertising, it’s all about knowing your viewers. But recent advancements around the industry and around the globe are forcing advertisers and publishers to reconsider how they use data in finding and engage with their target audiences. So, in an age of Cambridge Analytica and GDPR, what’s a buyer to do?It seems they can turn to mobile apps as a proxy for audience, using the wealthy guidance on user pursuits, behavior and demographics that mobile contraptions deliver. Gameloft Advertising Solutions, a client of Rubicon Project for two years, offers a good example of how this may be completed.