Google has to make big changes to its advertising empire. Here's what a judge ruled — minus the jargon.

Taboola is buying a rival adtech company to gain a bigger foothold with lucrative finance clients

Google won't have to break up its ad adtech empire, but there's a long list of changes it will have to make after being found liable for illegally monopolizing certain online ad markets.

The federal judge overseeing Google's landmark adtech antitrust trial has now unsealed her ruling outlining the behavioral remedies the ad giant will face.

The key takeaway is that Google — which operates an ad server that publishers use to manage and sell ads, the buying tools that help marketers buy ads, and an exchange that connects the two — won't be able to give its own services preferential treatment in auctions for ads that appear on websites across the open internet. The remedies will apply globally for six years.

"We're very pleased the court rejected the DOJ's proposal to break apart tools that help small businesses reach new customers and grow," a Google spokesperson said earlier this month when the judge presiding over the case announced she wouldn't order a breakup of the company

Here's a plain-English translation of the key remedies and what they mean for the various players in the online ad market.

Google can't enforce policies or contract terms tying DFP to AdX, or reimplement 'First Look' and 'Last Look.'

Translation: Google can't force publishers using its DFP ad server to also use its AdX exchange, or use auction mechanisms that give AdX an advantage over rivals.

First Look gave AdX the first chance to bid on an ad impression, while Last Look let it see what rival exchanges were bidding before deciding to place its own bid.

Patrick Briggs, CEO of digital ad agency Semify, previously HubShout, said removing advantages such as Last Look could make ad auctions more trustworthy, potentially improving the value of the broader display ad market.

Translation: Google's exchange and publisher ad server must work with Prebid, the widely used open-source technology that lets publishers invite multiple ad exchanges to bid for their ad space using a technique called header bidding. Google was a longtime holdout.

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