The 30-second version
On June 17, 2026, the UK's Competition and Markets Authority (CMA) imposed a fair ranking conduct requirement on Google. Google must now rank organic results using objective, non-discriminatory criteria (including in AI Overviews), explain how its ranking works, give advance notice of major changes, and open a complaints channel for businesses. Compliance deadline: six months. The decision targets the UK, but it sets a precedent that will weigh on all of Europe.
On June 17, 2026, the UK competition regulator ordered Google to explain to businesses how its search results are ranked, according to a decision published on GOV.UK. For the first time, a regulator in a major market is compelling Google to partly open the black box that SEOs have been probing for twenty years.
What Google must actually change
The CMA had designated Google with "strategic market status" in October 2025, a label that follows from its dominance: more than 90% of UK searches go through its engine. This fair ranking requirement is the first binding measure that flows from it. It imposes four specific obligations.
Specifically, Google must: rank organic results using objective and non-discriminatory criteria, including those shown inside AI Overviews (sponsored results stay out of scope); give businesses greater transparency about how its ranking works and provide advance notice of significant changes; and open a clear complaints process so penalized businesses can raise concerns and get an effective answer. A second requirement, on data portability of search data to authorized third parties, must be met within three months.
The phrase that matters: "advance notice." UK businesses had complained to the CMA that Google's ranking changes arrived "without sufficient notice" and with little recourse. Advance warning before major updates would change the game for sites that today absorb core updates and AI Overview swings with zero visibility.
Why a UK decision matters for your SEO everywhere
The CMA's decision does not legally apply outside the UK. But three reasons make it a signal worth watching closely. First, it is a regulatory precedent: it is the first time a regulator has secured from Google an obligation of transparency on ranking itself, not just on advertising or data. Second, Europe already has its own lever, the Digital Markets Act, which designates Google as a gatekeeper. The mechanisms wrung out in London become a possible template for Brussels and other capitals.
Third, Google rarely builds two different engines. What the company concedes in the UK, especially on objective criteria applied to AI Overviews, is likely to seep into its global doctrine. For businesses coping with the rise of zero-click search, the idea that a ranking must rest on "objective and non-discriminatory" criteria is more than legal wording: it is a promise of legible rules of the game.
What to do now (without waiting for the regulator)
The temptation is to wait for transparency to fall from the sky. Mistake. A regulator can cut the fog; it will not do the underlying work for you. Here are the concrete priorities.
- Document your positions and variations. Keep a history of your rankings and traffic per page. The day Google must give advance notice of a change, only those already measuring will know what to do with it.
- Build objective quality signals. Unique content, named sources, citable structure: these are exactly the signals an "objective" ranking rewards. Our reading of Google's patents on entities and LLMs shows where the sorting logic is headed.
- Track your AI visibility. Turn on and review the Search Console generative AI performance reports to see which pages already appear in AI Overviews.
- Prepare your complaints. If the appeal channel ever extends beyond the UK, a documented, dated, well-argued traffic drop will be worth ten protests with no evidence.
What this article does not cover
We do not detail the UK administrative procedure or the full timeline of the CMA's four conduct requirements (including the "publisher" requirement imposed on June 3, 2026, which lets media outlets block the use of their content by AI features). We also do not speculate on Google's legal response, which could challenge the order: as of publication, no detailed official position has been communicated. Finally, until the promised transparency ships, no one knows the actual level of detail Google will have to publish about its ranking criteria.
The Cicéro take
A regulator will never replace a content strategy. But this decision marks a shift: Google's ranking stops being an opaque fate and becomes a negotiable object. The businesses that already treat their visibility as a measurable, documented, quality-based asset will be the ones that make the most of transparency when it lands. The rest will keep absorbing the swings.
Sources
- → GOV.UK / CMA: "Further CMA action to secure a fairer deal for businesses and improve Google search services in UK" (June 17, 2026)
- → GOV.UK: measure detail "Google search fair ranking conduct requirement"
- → Search Engine Land: "UK CMA orders Google to explain how search results are ranked" (June 17, 2026)
Frequently asked questions
What exactly did the CMA order Google to do on June 17, 2026?
Does this decision apply to businesses outside the UK?
Does the requirement cover AI Overviews?
What should a business do now?
Growth and SEO content strategist, I founded Cicéro to help businesses build lasting organic visibility, on Google and in AI-generated answers alike. Every piece of content we produce is designed to convert, not just to exist.
LinkedIn