Google has been ordered to change how its adtech business works after a federal judge found it liable for illegally monopolizing certain online ad markets.
The ruling does not break up the company. But it does force a long list of behavioral remedies that will apply globally for six years.
At the center of the order is a simple constraint: Google cannot give its own services preferential treatment in auctions for ads that appear across the open internet. Google operates an ad server that publishers use to manage and sell ads, buying tools that help marketers purchase ads, and an exchange that connects the two.
The judge's remedy says Google cannot force publishers that use its DFP ad server to also use its AdX exchange, or use auction mechanisms that give AdX an advantage over rivals. That matters because tools like First Look and Last Look gave AdX an edge in bidding.
The order also requires Google's exchange and publisher ad server to work with Prebid, the open-source technology publishers use to invite multiple ad exchanges to bid for inventory through header bidding. Google had been a longtime holdout.
Publishers must also be able to receive bids through AdX without being required to use Google's DFP ad server. And if a publisher switches to a rival ad server, it must be able to take its data with it.
Executives in the adtech industry said the changes could make auctions more trustworthy and rival exchanges more competitive. Patrick Briggs, CEO of digital ad agency Semify, said removing advantages such as Last Look could improve the value of the broader display ad market. Rajeev Goel, CEO of PubMatic, said the remedy should help rival exchanges compete more fairly with AdX.
There is still one more step before the order is final: the judge has not yet issued the legal order spelling out exactly how the remedies will work. Google has said it plans to appeal part of the court's liability ruling.
For founders and publishers, the practical takeaway is about leverage. The court is trying to stop one company from using control over the pipes to steer traffic, bids, and revenue toward its own products. In adtech, that kind of gatekeeping can distort margins fast.
If the remedies hold, smaller publishers may get a cleaner shot at comparing tools on the merits. And for everyone selling digital inventory, the new rules could reduce switching costs and make the marketplace a little less opaque.
