What actually happened

On 22 September 2026 Google emailed eligible Merchant Center accounts that their Shopify store had been matched. Native checkout inside AI Mode on Search and in Gemini was live. Eligible products were included automatically. There was nothing to set up.

Shopify’s help page is the rulebook. Direct checkout is on by default for eligible stores. The only off-switch is Shopify Admin > Sales channels > Agentic. Turn off “Allow Shopify to manage for me,” open Google AI Mode and Gemini, then deactivate Direct checkout.

You stay merchant of record. Shopify still processes the order. Shoppers can pay with Google Pay. Discovery can continue even if you kill checkout. In that case Google sends the buyer to your store.

Why a small team cares

Take a US apparel store on Shopify with a clean Merchant Center feed. A shopper asks Gemini for a black jacket under $120. They buy inside the chat. The order lands in Shopify. The thank-you page never loads. Custom pixels, Klaviyo post-purchase, and checkout upsells that live on your theme do not run. Shopify says custom pixels and product bundles are unsupported in this checkout.

That is the trade. Less friction. Worse control of the last mile.

US vs EU is not a grey area on the official page. Direct checkout requires a store based in the United States that sells to US customers. The Buy path is shown only to customers based in the United States. Everyone else can still see the product and is sent to your site to pay.

An EU Shopify store with a Merchant Center feed is not in this auto-enrolment. A US store selling into Europe still only gets the in-Gemini checkout for US buyers. Google has talked about Canada, Australia, and later the UK for UCP checkout. The EU is not on that list yet.

If you buy Google ads from Marbella against a US catalog, this can change Monday reporting. If the store and the shopper are both EU, this week’s action is confirm you were not enrolled, not rewrite checkout.

Hype vs useful

The hype is “Google now sells your catalog.” The useful fact is narrower. Auto-enrolment is US store, US shopper, eligible feed, default on. Opt-out is buried. Measurement and post-purchase can break. EU operators do not get the checkout and should not plan media as if they did.