This week, Google announced the biggest update to their platform in twenty-five years. They released "Search Agents," which run in the background, watch for what a shopper might need, and surfaces options at moments it judges relevant. Google described it as helping shoppers "find exactly what they need at exactly the right moment."

Although Google named them "search" agents, they are better described as a personal buying assistant. This marks the true beginning agentic commerce: a world in which brands have to market directly to AI agents, because the AI agent is the one deciding what reaches the buyer.

What Google built

The product is straightforward to describe. An agent persists across a user's Google footprint, holds context about their preferences and recent activity, and surfaces options when it decides the moment is right. The user doesn't have to ask for anything. The agent decides when to act, what to bring forward, and how to present it.

It's one piece of a larger pattern. ChatGPT's shopping experience pulls in similar directions, Perplexity returns recommendations alongside its search results, and Stripe has been building payment rails so an agent can buy on a user's behalf. Google's announcement matters because of Google's distribution and category influence; the underlying capability has been shipping in other products for a while.

Active search versus passive shopping

Search is something a person does. You sit down, you type a query, you read what comes back, you click on one of the links, you compare options, you decide. Each step requires the user to be doing the work. Search is an active discipline that Google has trained two generations of consumers to perform.

A buying agent works differently. The user isn't searching. The user is going about their day. The agent is watching, deciding what the user probably wants or needs, and bringing it forward. The buyer's job is approval. The agent has already done the searching and the choosing before the buyer was involved.

AI agents--whether it's Google's agent, ChatGPT, Claude--are now middle-men between human buyers and brands. AI has its own opinions about brands, and those determine whether it decides to recommend certain products or not.

We've written before about the progression: research assistant, advisor, decision maker, autonomous purchaser. Each rung pulls the human further from the moment of choice. Passive shopping is well up that ladder. It's also the first version of it that ships at consumer scale, with the kind of distribution that normalizes the behavior across categories.

How this changes marketing

For as long as marketing has existed, the work has been to shape what the human buyer thinks. There is now a second entity in the picture, with its own beliefs about your category and your competitors, sitting between you and that buyer. That second entity is the one the buyer is increasingly listening to.

Marketers know how to study the first audience. They run interviews, read sales calls, watch how copy lands. The same kinds of questions are reasonable to ask about an AI audience, and almost no one is asking them. What does Claude believe about your category, and on what criteria does it judge the options? Which competitor does ChatGPT reach for first when a buyer in your persona asks for a recommendation? Where does the model's view of you diverge from the view your customers actually hold?

Most marketing teams haven't done this work because, until recently, they haven't had to. The AI audience is becoming meaningful at different speeds in different categories, faster in B2B SaaS and developer tools, slower in categories where buyer taste and identity carry more weight. Teams starting now have time to develop a picture of what the AI audience believes about them before that belief starts deciding deals.

Where this leads

A brand used to address a buyer through channels it controlled and earn consideration directly. A brand now has to convince an middle-man, in a conversation it cannot see, that it deserves to be brought forward.

Brand strategy has always been about understanding what an audience believes and shaping that belief over time. Today the audience expanded by . The added member is a careful reader, has formed views on every brand in every category, and is increasingly the entity making the buying decision. Most marketing teams haven't started to study that audience yet. The ones that start sooner are going to be glad they did.