Jessica Davies:

The arrival of the General Data Protection Regulation’s enforcement May 25 has hurled the digital media and advertising industries into a tailspin.
 
 Since the early hours of May 25, ad exchanges have seen European ad demand volumes plummet between 25 and 40 percent in some cases, according to sources. Ad tech vendors scrambled to inform clients that they predict steep drops in demand coming through their platforms from Google. Some U.S. publishers have halted all programmatic ads on their European sites.
 
 Google contacted DoubleClick Bid Manager clients over the last few days to warn them that until it has completed its integration into the Interactive Advertising Bureau Europe and IAB Tech Lab’s GDPR Transparency & Consent Framework that publishers, ad tech vendor partners and advertisers should expect a “short-term disruption” in the delivery of their DoubleClick Bid Manager campaigns on third-party European inventory, starting May 25.