The Google I/O announcement buried in the Gemini keynote
At Google I/O this morning, Sundar Pichai demoed something that looked like a minor product feature but represents a structural shift in how e-commerce works: Gemini found items in a user's email, compared prices, and completed a purchase inside the Gemini app without the user visiting a single retailer's site.
This isn't a concept. It's already live.
Since January 2026, Google has been quietly rolling out agentic checkout through the Universal Commerce Protocol (UCP) — an open standard co-developed with Shopify, Wayfair, Target, Walmart, Etsy, and 20+ retailers including Gap and Ulta Beauty. The user picks a product inside AI Mode or the Gemini app, confirms via Google Pay, and the order lands in your Merchant Center as a completed transaction. No bounce. No landing page. No cart abandonment.
Tomorrow at Google Marketing Live, Google will announce the expansion of this program to significantly more merchants.
What the checkout actually looks like
A shopper asks AI Mode: "find me a waterproof running shoe under $120." Gemini surfaces three options with price, delivery window, and return policy pulled from your Merchant Center feed. The shopper picks yours. Google pre-fills their Google Pay credentials and shipping address from Google Wallet. They confirm. Order done.
Your Merchant Center admin shows the sale. Your pixel may or may not fire, depending on your implementation. Your retargeting sequence doesn't run. Your post-purchase email flow still fires. But the middle part — the landing page, the product detail page, the add-to-cart — gets skipped entirely.
Gap reported in April that agentic checkout was converting at a meaningfully higher rate than standard shopping ads, because the purchase decision is already made before the user "checks out." The friction is gone. So is your ability to cross-sell on the page, show UGC reviews, or nudge hesitant buyers with scarcity signals.
You don't get to run your conversion rate optimization playbook on a sale that happens inside Google's interface.
What your ad account needs before tomorrow
Google has been running a pilot called Direct Offers alongside agentic checkout. This is the mechanism that keeps you competitive inside AI Mode even when a Gemini agent is doing the buying.
Direct Offers works like this: you create a promotion in Merchant Center — a discount code, a free shipping threshold, an exclusive bundle — and Google surfaces that offer to high-intent shoppers inside the agentic checkout flow. If a Gemini agent is comparing your product against two competitors and you have a verified $10-off code in the system, the agent factors it in. No offer means you compete on price alone.
Setting this up isn't complicated. You need a promotion in Merchant Center linked to a real promotion code. The offer has to be verified — Google won't invent deals for you, and fabricated promotions get flagged and pulled.
The other thing to check before GML: whether your account is eligible for UCP enrollment. As of today, the program is open to select Shopify merchants and larger retail accounts. If you run Shopify, go to Settings → Payments → Agentic Commerce in your Shopify admin and confirm the Google integration is active.
Your Merchant Center feed is now your checkout page
Your landing page used to be where conversion happened. It's where you controlled the experience: the photos, the size guide, the "people also bought." In agentic checkout, none of that runs. The Gemini agent builds its understanding of your product entirely from what's in your Merchant Center feed.
Thin feeds lose sales to agents. If your product title is "Blue Shirt M" and your competitor's is "Men's Slim-Fit Stretch Oxford Shirt, Blue, Size M — Machine Washable, Free Returns," the agent understands their product better and may select it over yours at the same price.
The four feed attributes that matter most for agent comprehension: return_policy (structured values, not a URL), shipping_label (a specific delivery window, not "standard"), product_highlight (three to five bullet points on what the product actually does), and product_detail (structured specs — dimensions, material, compatibility). If you've been putting off feed cleanup, this is the week to start.
What to watch at GML tomorrow
Google Marketing Live 2026 starts at 8:45 AM PT on May 20. Based on the I/O keynote today, expect expanded UCP eligibility for standard Merchant Center accounts, updates to how Direct Offers get served in agentic results, and new conversion tracking documentation for purchases completing inside Google's interface.
The metric to monitor in your Google Ads account after tomorrow: compare "Conversions" in Google Ads against "Sessions from Google / Organic" in GA4. If agentic checkout scales, you'll see the gap widen. Revenue up, site sessions flat — that's the signal the shift is happening in your account.
Before that divergence shows up, run a feed quality and conversion tracking audit. The Gromerce audit tool flags the specific Merchant Center and tracking gaps that matter most as agentic checkout expands.
The sale still happens. The question is whether it happens through you or despite you.
Related articles: Your Google Ads Are Showing in AI Mode Now — Here's What That Changes · Google Ads CTR Is Up — So Why Are Your Conversions Flat? The Data Finally Has an Answer · Google Marketing Live Is 8 Days Away. Here's What You Should Have Ready.
Sources: Google Blog, Search Engine Land, Search Engine Journal, eMarketer, Fast Company, May 2026
