Google I/O 2026: Search stops answering and starts acting.

In our previous case study, we described the first major shift: SERPs ceasing to be an index of links and becoming a synthesized answer. AI Overviews had reached 54% of Italian searches and organic click-through had plummeted by 61% on informational queries. I/O 2026 adds a second, qualitatively different shift: Search no longer limits itself to composing an answer, but performs actions on behalf of the user.

The starting point is the model. Gemini 3.5 Flash becomes the default model of AI Mode for all users worldwide: it is the engine designed for agent functions and coding, and it is what makes everything else possible. Around this model, Google redesigns the only element that remained almost unchanged for two decades: the search bar. The new one expands as you type, accepting text, images, files, videos, and even open Chrome tabs as input, and suggests how to continue the question with generative suggestions that go beyond autocomplete. In practice, Google is encouraging longer, conversational, and multimodal queries: the three-keyword dry query becomes the exception, not the rule.

Upon this foundation, agents are born. Information Agents are configurable software systems that remain active 24/7: they monitor blogs, publications, social media, and Google's real-time data on finance, shopping, and sports, then alert the user when something matching their criteria emerges, proposing an action. Google's example is telling: home buyers can describe their requirements and let the agent scan the market and flag the right listings as they appear.

Then comes actual action. Agentic bookings extend to local experiences and services: you describe what you want ("a karaoke room for six, Friday night, serving food late") and Search gathers prices and availability with direct links to finalize. For some categories — home repairs, beauty, pet care — Google can even make phone calls to businesses on the user's behalf. Finally, generative interfaces: Search writes code on the fly, with Antigravity, to build the tool best suited to the query — a simulation, a comparison, or even a mini-app like a workout tracker drawing from local reviews, maps, and weather. Personal Intelligence closes the loop by connecting personal context (Gmail, Photos, soon Calendar) to make all this relevant to the individual.

I/O 2026 confirms a trajectory that has lasted for three years and accelerates at each stage. First, the SERP was an index and the synthesis work was done by the user. Then the generated response arrived and the work was done by the model. Now action arrives, and a growing part of the work — searching, comparing, booking, calling, building tools — is done by the agent. With each step, the point of contact between company and customer moves one degree further away from the traditional website.

This does not make the website useless, but it changes its role once again. After AI Overviews, we said the site goes from destination to source. After I/O 2026, a layer must be added: the site also becomes an endpoint for agents — a place from which software reads data and, where possible, performs actions. A page that converts little human traffic but is read correctly by agents across thousands of relevant intents holds a value that no session-based KPI can measure.

The good news is that much of the work is the same that makes a site robust for GEO: structured data, factual and updated content, clear entity identity, verifiable authority. The difference is that now these elements do not just serve to get cited in an answer, but to get selected and executed by an agent. The most advanced features will land in the US and for Pro subscribers first, but the direction is set and timelines are measured in months.

As with AI Overviews, the greatest risk is not the change itself: it is not noticing it. A business can continue to see "normal" KPIs while, underneath, agents begin to systematically choose the most readable and actionable competitors. Those who build the agentic layer now — while the market is still focused on the ten blue links — get ahead on a lead that, this time too, will be hard to catch up with later.