In January 2026, Google announced the Universal Commerce Protocol - an open standard for agentic commerce co-developed with Shopify, Walmart, Target, Etsy, Wayfair, and over 20 other industry players. The premise is straightforward: instead of requiring a separate technical connection for every AI agent and every retailer, UCP creates a common language that lets agents interact across the entire shopping journey, from discovery through purchase to post-purchase support.
Paid search advertisers should care about this in ways that aren't immediately obvious from the announcement.
How agentic shopping changes the intent signal
Traditional paid search works on a simple model: a user expresses intent through a query, the advertiser bids to appear in response to that query, and the user clicks through to a landing page to complete a transaction. The intent signal is the search query. The click is the conversion event.
In an agentic commerce model, an AI agent expresses intent on behalf of a user. The agent has been given a brief - "find me a running shoe under £80 with good reviews" - and it executes that brief across multiple surfaces and retailers simultaneously. The traditional keyword-to-click model doesn't map cleanly onto this journey.
The Business Agent implication
Google has also launched Business Agent - a way for shoppers to chat directly with brands on Search, described as a virtual sales associate that answers product questions in a brand's voice. For advertisers, Business Agent raises the question of what happens to paid search performance when users can get answers to product questions directly on the SERP without clicking through to a site.
What to do now
For most UK advertisers, the agentic commerce infrastructure isn't yet operationally relevant - it's US-centric and in early rollout. But the direction of travel is clear enough to prompt preparation rather than reaction.
Ensure your Merchant Center product data is complete, accurate, and enriched with the new attributes Google is launching for conversational commerce. Ensure your Product Schema on-site is current. And watch Direct Offers as it expands - it's the most direct early indicator of how paid advertising adapts to the agentic model.