Google Launches Universal Cart in Search and Gemini in the US

Google is launching Universal Cart in the US, letting shoppers add products from different stores to a single cart through Google Search and the Gemini app. As Search Engine Journal reported on October 15, 2026, shoppers can check out within Google or take their selected items to a participating retailer’s website. For retailers, these are different routes to an order, with different levels of visibility into what shoppers do.

A shared cart in Search and Gemini

Shoppers can add products to Universal Cart from Search, including AI Mode, and from the Gemini app. The list carries over between them: items saved in one service are available in the other. Shoppers can also get alerts when saved products drop in price or come back in stock.

The cart is powered by Google Wallet. It displays promo codes and can suggest which card offers the best benefits for a purchase. Retailers Google names as offering checkout within the cart or a handoff to their websites include Nike, Sephora, Target, Ulta Beauty, Walmart, Wayfair, and many Shopify stores. In both cases, the store remains the seller.

Universal Cart was first unveiled in May at I/O. At the time, Google expected the cart to arrive in Search and Gemini in the US by the end of the summer, with YouTube and Gmail to follow. The launch announcement gives no timeline for those last two services. It also does not describe the price history, incompatible-product warnings, or loyalty program information mentioned in May. Their absence from the new announcement does not tell us whether those features are available now.

Two ways to complete a purchase

Shoppers can check out within Google or take their selected products to a retailer’s website. In the second case, a prefilled cart is created on the retailer’s side. This step is handled by the Cart API in the Universal Commerce Protocol (UCP): during the handoff, a CreateCart call creates a cart in the retailer’s system.

For now, the Cart API only creates a cart and hands it off in one direction. The first version does not support updating or deleting items, or syncing cart contents between Google and the retailer. Checkout within Google uses a separate API; retailers do not need to integrate it just to support cart handoff.

Participating stores that meet the integration requirements choose an integration option in the UCP hub in Merchant Center. This section is gradually becoming available in the US. According to Google’s help documentation, Australia and Canada should follow next year. The article does not give launch dates for Universal Cart itself outside the US.

What retailers and marketers should check

The key distinction for a retailer is where checkout happens. After a cart handoff, the purchase takes place on its website. With checkout inside Google, the shopper may never visit the site. So having a product added to Universal Cart does not, by itself, mean a site visit or guarantee that every step of the journey will appear in standard web analytics.

In Merchant Center, the UCP Analytics Reporting dashboard tracks the journey from a click on the buy button through to orders and cancellations. The Merchant API reference also lists the number of cart handoffs and average cart value at the time of handoff among its metrics. Reporting through this API is still in alpha. The documents described here, however, do not include a metric for how many products users have saved to a cart. The available metrics therefore cannot show the entire journey from saving a product to buying it.

There is an additional nuance for Shopify stores. The platform says Direct Checkout is enabled by default for eligible US stores. When a purchase goes through Direct Checkout, Google Analytics and custom pixels do not fire. But the article does not establish whether purchases within Universal Cart from Shopify retailers follow the same process. Stores can check their Direct Checkout status in the Shopify admin under Sales channels > Agentic. We have already written about how Shopify connects stores to new AI shopping channels; here, it is particularly important not to assume that the known limitations of one checkout flow apply to another without checking.

My take: count more than visits

I would not call Universal Cart “the end of traffic.” It is more like another route: shoppers discover a product on Google, save it to a shared cart, then check out there or continue to the retailer. Demand for discoverable content remains, but it is getting harder to judge its results by site visits alone.

I would first find out which integration option is available to the store and which events are visible in Merchant Center. Then I would look separately at cart handoffs, purchases within Google, and site visits, without treating one as a proxy for another. And for shoppers arriving with a prefilled cart, I would test the mobile checkout experience: at that point, the usability of the site still affects the shopper’s experience and the store’s results.

Sources

Where the news comes from. The text is a retelling in the author’s own words; the facts come from the source, the opinion is the author’s.

1. Google’s Universal Cart Is Live: How Carts Get To Your Store via @sejournal, @MattGSouthern www.searchenginejournal.com

About the author

Renate Helm

SEO strategist for online stores

I work with organic traffic and e-commerce content. Right now I’m especially interested in how search queries change as answers increasingly appear right on the results page.

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