Google Expands Universal Cart and AI Tools for Retailers

MOUNTAIN VIEW, Calif. - Google is significantly expanding its Universal Commerce Protocol strategy with the introduction of a Universal Cart, a feature that enables shoppers to hold products from multiple retailers and services in a single digital container. The announcement represents a major shift in Google's commerce strategy, moving the tech giant beyond its traditional role as a directory of links and toward a unified orchestration layer for digital transactions. By integrating this functionality across Search and Gemini, Google aims to streamline the fragmented experience of modern e-commerce, where consumers often navigate dozens of browser tabs and separate checkout flows to complete a single shopping mission.

The move comes as the search giant faces intensifying competition from social commerce platforms like TikTok Shop and Instagram, as well as the enduring dominance of Amazon’s one-click purchasing ecosystem. For Google, the retail sector is a vital component of its advertising revenue, and maintaining its position as the primary starting point for product discovery is a strategic priority. The Universal Cart is designed to work across diverse user experiences, ensuring that whether a user is performing a traditional search or interacting with Google’s Gemini AI assistant, their shopping progress remains persistent and accessible.

When a shopper is ready to finalize a purchase through the new system, participating merchants can support a direct checkout via Google Pay or opt to have the cart transferred seamlessly to their own websites. This flexibility is a core component of the Universal Commerce Protocol, intended to reduce the high rates of cart abandonment that plague mobile commerce. Google named several retail giants as early participants in the initiative, including Nike, Sephora, Target, Ulta Beauty, Walmart, and Wayfair. The inclusion of these major brands suggests that Google is prioritizing scale and reliability as it tests the boundaries of multi-retailer transactions.

Central to this expansion is a suite of updated Merchant Center tools designed to help brands understand how their products are being presented within AI-assisted shopping environments. As generative AI becomes a more prominent fixture in the discovery process, retailers have expressed concerns regarding how their branding and product specifications are synthesized by large language models. These new visibility tools are intended to give merchants the data they need to participate effectively in emerging agentic checkout flows, where AI agents may eventually handle the granular details of price comparison and availability on behalf of the consumer.

Google has emphasized that under this new protocol, the retailer remains the merchant of record for all transactions. This distinction is legally and operationally significant, as brands require absolute control over payment processing, fulfillment, returns, and the direct customer relationship. Even when the initial discovery and cart-building phase begins inside an AI assistant like Gemini, the merchant of record status ensures that the underlying retail business retains the transaction data and the responsibility for the final delivery of goods. This structure is likely an attempt to soothe long-standing industry fears that Google might attempt to disintermediate the relationship between brands and their customers.

Beyond physical goods, Google is also extending the protocol to include hotel bookings, food delivery, and local-service actions. This expansion demonstrates that the Universal Commerce Protocol is intended to be a comprehensive ecosystem covering nearly every category of consumer spending. By incorporating high-frequency services like food and travel, Google creates more opportunities for users to adopt the Universal Cart as a daily utility, potentially increasing the frequency of interactions with its commerce tools and providing a richer dataset on consumer intent across diverse industries.

For merchants, the primary opportunity presented by these updates is direct access to high-intent shoppers who may no longer begin their journeys with a conventional search result or a direct visit to a store's URL. As search habits evolve toward conversational interfaces, being optimized for Google's commerce protocols becomes as important as traditional search engine optimization was in the previous decade. However, analysts note that the tradeoff for this access is a greater degree of dependence on Google's proprietary interface and ranking systems, which could create new vulnerabilities for retailers if those algorithms shift.

To succeed within this new framework, retailers will need to maintain highly reliable product feeds and precise inventory data. The complexity of the system increases with the introduction of agentic commerce, where an AI might be authorized to execute a buy order based on specific user preferences. For these automated flows to work without friction, merchants must provide clear rules for when an agent may complete a purchase, ensuring that pricing, availability, and delivery timelines are synchronized in real-time to avoid the risk of overselling or pricing errors.

While the Universal Cart could significantly reduce the friction of buying across several different stores, the concept of a cross-merchant checkout introduces difficult edge cases that have historically challenged the retail industry. Managing shipping costs from multiple origins, applying various promotional codes, and handling partial returns from a single unified order are complex logistical hurdles. Google must make these individual responsibilities visible to the consumer before the final confirmation of a transaction to prevent customer service disputes and ensure transparency in the buying process.

The broader sector is currently undergoing a transformation toward 'headless commerce,' where the front-end user experience is decoupled from the back-end transaction engine. Google’s latest updates lean into this trend, positioning the company as a universal front-end for a fragmented retail landscape. Industry observers have noted that while Google has attempted various shopping initiatives in the past, the current focus on a protocol-based approach rather than a closed marketplace may be better suited to the diverse needs of modern global retailers who are protective of their brand identity.

The execution risks for Google involve balancing the needs of the shopper with the demands of the merchant. If the Universal Cart experience is too restrictive, merchants may decline to participate; if it is too complex, shoppers may revert to familiar single-site checkouts. Furthermore, the accuracy of product representation within Gemini remains a critical factor. If AI-generated summaries lead to mismatched expectations regarding product features or return policies, the resulting friction could damage the reputation of both the platform and the participating retailers.

Looking forward, the industry will be watching closely to see how quickly the aforementioned early participants integrate the protocol and whether small-to-mid-sized enterprises can easily adopt these tools alongside the retail giants. The ultimate success of the Universal Commerce Protocol will depend on its ability to simplify the commerce journey without weakening merchant control or confusing shoppers about who is responsible for the order after the sale. If Google manages to solve these integration challenges, it could fundamentally redefine the mechanics of digital trade in the age of generative artificial intelligence.