The news signals a significant step forward following the publication of the ISBA Programmatic Supply Chain Transparency Study, in association with AOP and carried out by PwC, in May 2020. The transparency study, which looked at disclosed media buys, revealed it was only possible to match 12% of ad impressions, end-to-end, with an average of 15% of supply chain costs (ad spend) unattributable (the ‘unknown delta’.) The report highlighted a lack of standardised data across different suppliers and...