For marketing professionals, the timeline matters as much as the substance. The September order already signaled the court's direction by rejecting a breakup of Google's ad tech business. This week's full opinion fills in the details of the obligations Google now faces — and, as Digiday's analysis frames it, some of those changes will take years to implement.

The case itself moved slowly by design. Twenty-six witnesses testified during the remedies phase. Both sides filed extensive briefs. Judge Brinkema, who oversees Google's second antitrust case, weighed the arguments before issuing the two-page order in September and the full remedy opinion this week.

The DOJ and the 17 state co-plaintiffs filed their original complaint three and a half years ago. The verdict arrived last April. The remedies phase consumed the seventeen months since.

What the monopoly finding means in practice: the court accepted the argument that Google's dual control of publisher-side tools and buy-side marketplaces illegally foreclosed alternatives. Advertisers and publishers who wanted to route spending elsewhere found they couldn't realistically do so, according to the case the government built.

The remedy, however, stops short of structural separation. Google keeps its ad tech stack intact. Instead, the company operates under a code of conduct — the specifics of which Digiday breaks down in its full analysis of what changes, what doesn't, and what will take years.