The world's largest advertiser, Procter & Gamble (P&G), has challenged its agencies to become more vigilant in addressing issues like transparency and fraud in its pursuit of a better, more efficient digital advertising ecosystem. P&G's Chief Marketing Officer, Marc Pritchard, recently spoke at the Interactive Advertising Bureau's (IAB) Annual Leadership Meeting and implored the entire industry to adopt the Media Ratings Council (MRC) viewability standard, leverage third party tools for measurement and transparency, and work with the Trustworthy Accountability Group to help eliminate fraud.