Agentic Browsing in PageSpeed Insights: where does the new section in your scores come from?

If you have opened PageSpeed Insights in the last few weeks, you may have noticed something new. Next to the familiar categories Performance, Accessibility, Best Practices and SEO, there is now an extra section: Agentic Browsing. It was not there before. For many companies it looks as if their site suddenly grew a section full of untested items.

Relax. Your site is not broken. Google widened the scope of the audit, and we already know what to do about it.

What actually changed

In May 2026 Google released Lighthouse 13.3, the engine that powers PageSpeed Insights. The new version moved the Agentic Browsing category from experimental into the default configuration. PageSpeed Insights picks up these changes with a delay of about two weeks, so since late May the new section shows up for everyone who checks their site. Nobody had to switch anything on. It appeared on its own.

What Agentic Browsing is

Until now, sites were judged for people and for classic search engine bots. Agentic Browsing looks at something different: how well a site works with AI agents. These are programs that read pages on their own to answer a question, compare offers or complete a task. You use them when you ask an AI assistant for a recommendation and get a ready answer instead of a list of links.

Agentic Browsing checks, among other things, whether the page structure is readable for such an agent, whether content does not jump around while loading (the same CLS metric that also matters for people), whether there is an llms.txt file describing the site for AI models, and whether the site exposes so-called WebMCP, an orderly way for an agent to act on it.

One important point: this category is not a Google ranking factor today. It does not change your position in search results. What it does affect is how your business shows up in AI-generated answers, for example in AI Overviews. And those surfaces are growing fast.

Why scores may look lower

This is the heart of the misunderstanding. Your site gets exactly the same Performance or SEO scores today as before. Nothing dropped technically. A new category simply appeared, one that was not there yesterday, with a set of new tests.

Second thing: Agentic Browsing does not work like the rest of PageSpeed Insights. You do not get a score from 0 to 100. You get a ratio, that is, how many tests the site passed out of those available. A freshly added section where some items are not passing yet looks alarming at first glance. In reality it is a new area that is still taking shape, not a regression of your site.

What we do at Studio Kozubek

We do not wait for clients to ask. The sites we run have been built properly from the ground up for years, so a large part of what Agentic Browsing rewards we already have covered: a stable layout with no jumps, a structure that machines can read, speed. The same things that kept your PageSpeed and SEO scores high also work in your favour in the new category.

The rest we add actively. We review client sites against the new tests and implement the missing pieces: an llms.txt file describing the company for AI models, tidying up the structure for reading by agents, preparing for WebMCP where it makes sense. The goal is simple. The score should return to the level you are used to, and your site should be ready for a time when customers increasingly reach businesses through AI assistants, not only through classic search.

That is good news. The internet is moving toward AI agents, and your website is being prepared for it before it became a requirement.

In short

The new section in PageSpeed Insights is not a failure and not a reason to worry. It is a sign that the rules of the game are widening, and we are already playing by the new ones. If we run your site, we roll out the relevant changes on an ongoing basis. If your site comes from elsewhere and you see a new category with no passing tests, get in touch. We will check what can be improved so your business is visible also where AI gives the answers.