Antitrust proceedings have an awkward property: they run for years, change little immediately, and generate a stream of headlines that appear to contradict each other. Filing them under "matters for lawyers" is understandable. But buried in the findings is a passage that speaks directly to anyone buying ads: the court found that Google exercised its monopoly power by charging supracompetitive prices for general search text ads.
Translated: a court determined that, absent effective competition, the price advertisers paid was higher than it would have been in a competitive market. That is a statement about a line in your P&L.
Two different cases, routinely conflated
| Search case | Ad tech case | |
|---|---|---|
| Subject | Monopoly in general search and search text ads | Monopoly in publisher ad servers and ad exchanges |
| Products involved | Google Search, Chrome, distribution | DoubleClick for Publishers, AdX |
| Status | Behavioural remedies decided in 2025, appeal in progress | Liability established, remedy phase in 2026 |
| Relevance to a search advertiser | Direct: it concerns the auction you buy in | Indirect: it concerns display and programmatic video |
The search case
The September 2025 remedies order imposed behavioural measures rather than the structural separation that had been sought. Among them: a prohibition on Google entering exclusive distribution contracts for Google Search, Chrome, Google Assistant and the Gemini app for six years, and a requirement to provide search results and certain other content to "qualified competitors", with the stated aim of letting upstart search engines get off the ground.
Google has appealed, seeking among other things to lift the data-sharing mandate, arguing that data disclosure and compelled syndication remedies would be extraordinary and legally impermissible.
The ad tech case
Here liability is already established: Google illegally monopolised the markets for publisher ad servers, through DoubleClick for Publishers, and ad exchanges, through AdX. The remedy phase came to decision in 2026 and carries the higher stakes: the Department of Justice requested divestiture of AdX, and an order to that effect would be the first forced divestiture of a major tech platform.
Worth keeping straight. The ad tech case concerns the display and programmatic video chain first and foremost, not the Search auction. An advertiser spending almost entirely in Search and Shopping is far less exposed to it than a publisher or a programmatic display buyer.
What changes for an advertiser, realistically
In the short term: little or nothing. Behavioural measures act on distribution structure, not on the daily operation of an account. Nobody wakes up to a different CPC because a brief was filed.
Over the medium term, three effects are plausible and worth watching.
- More alternative search surfaces. If "qualified competitors" obtain the mandated data access, alternative engines and conversational assistants become more credible. For buyers that means there may, in a few years, be something worth testing outside Google — which today, for most budgets, there is not.
- A more fragmented ad tech market. If AdX were divested, the programmatic chain would reorganise. More competition between exchanges can lower intermediation costs, but during the transition it produces operational complexity.
- More scrutiny of pricing transparency. The least spectacular effect and perhaps the most concrete: proceedings of this kind tend to push platforms toward more explicit accounting of how costs are formed.
What to do in the meantime
The operational answer to regulatory uncertainty is not to wait: it is to reduce dependence on variables you do not control.
- First-party data. Whatever the outcome, a business that knows its customers and can reach them without intermediaries is less exposed. The same reasoning applies to privacy, covered in the Consent Mode v2 and DMA guide.
- Independent measurement. Knowing what a customer is genuinely worth, from your own data, lets you judge a channel rather than trust its dashboard.
- Realistic diversification. Not "move budget to other platforms" as a matter of principle, but knowing what your plan B would be and having tested it small.
- Respect judicial timelines. Appeals and stays stretch things out by years. Business decisions should not be made on the expectation of an outcome.
How to read the news on this
Three criteria that keep headlines in perspective:
- Separate liability from remedy. Finding that a violation occurred and deciding what to do about it are distinct phases, often months or years apart.
- Separate behavioural from structural remedies. The former mandate conduct; the latter break the company up. In the search case the court chose the former.
- Count the appeals. A decision under appeal has no immediate effect. Between a ruling and real change there is nearly always another round of litigation.
The healthy way to treat this material is as context, not as a plan. Meanwhile, the work that genuinely protects a business is the work on its own data and its own measurement: if you want to see where you stand, the free audit starts exactly there. See also our services.