From Walled Gardens To Working Media: The Rise Of Commerce Media

The Evolution of Retail Media: From Tactic to Transformation

In less than a decade, retail media has undergone one of the most dramatic evolutions in the history of modern advertising. What began as a relatively niche monetization tactic — piloted primarily by large, margin-seeking mass retailers looking to squeeze incremental revenue from their digital shelf space — has grown into one of the fastest-expanding advertising channels on the planet. By nearly every measurable metric, retail media works. Marketers have shifted billions of dollars in co-op funds into it, lured by the tantalizing promise of closed-loop measurement, first-party data, and deeper return on their commercial relationships with merchants. But beneath the surface of that impressive growth lies a more complex and nuanced story — one that is increasingly being told through the lens of a broader concept: commerce media.

What Are Walled Gardens and Why Do They Matter?

To understand the rise of commerce media, it helps to first understand the structure that retail media was originally built upon: the walled garden. A walled garden, in advertising terms, refers to a closed ecosystem where a platform controls all data, inventory, and measurement — keeping advertisers largely in the dark about how their money is truly performing outside of the platform's own reporting tools.

Amazon Advertising, Walmart Connect, and Kroger Precision Marketing all operated, to varying degrees, as walled gardens. Brands could buy ads, see performance dashboards, and optimize campaigns — but only within the rules, metrics, and interfaces that each retailer chose to offer. Cross-retailer comparability was nearly impossible. Attribution methodologies varied wildly. And the brands themselves had limited ability to verify whether the results they were seeing reflected real-world business outcomes or platform-optimized numbers.

This created a growing tension in the market. Brands were pouring money into retail media networks with genuine enthusiasm, but many were doing so with incomplete information and limited accountability. The measurement gap between what retailers claimed and what marketers could independently verify was widening — and CFOs were starting to ask harder questions.

The Shift From Retail Media to Commerce Media

Enter commerce media — a term that represents both an evolution of retail media and a meaningful departure from its walled garden roots. Commerce media expands the definition of retail media beyond the retailer's own properties and into the broader open web, connecting purchase intent signals and first-party commerce data to advertising inventory that spans display, video, connected TV, and beyond.

Rather than confining a brand's advertising to the digital shelves of a single retailer, commerce media networks allow advertisers to activate against high-quality shopper audiences across multiple channels and environments — while still maintaining the performance accountability and purchase-based measurement that made retail media attractive in the first place.

This is the key distinction: commerce media is not just about where ads appear, but about how commerce signals are used to make those ads more relevant, more measurable, and more connected to actual business outcomes. It bridges the gap between brand awareness and transactional conversion in a way that neither traditional programmatic advertising nor pure retail media networks could fully achieve on their own.

Why Marketers Are Embracing the Commerce Media Model

The appeal of commerce media for today's marketers is rooted in several intersecting trends that have fundamentally reshaped the advertising landscape:

• The deprecation of third-party cookies has accelerated demand for first-party data solutions. Retailers sit on rich, consented purchase data that is both privacy-compliant and highly predictive of future buying behavior — making them uniquely positioned partners for advertisers seeking audience quality over audience scale.
• The rise of omnichannel shopping has blurred the line between discovery and purchase. Consumers research products on social media, compare prices on search engines, watch reviews on streaming platforms, and complete purchases in-store or online. Commerce media is designed to meet them across all of these touchpoints rather than forcing marketers to manage disparate campaigns on disconnected platforms.
• The demand for closed-loop measurement remains one of the most compelling reasons marketers continue to invest in commerce media over traditional digital advertising. The ability to connect an ad impression — whether served on a retailer's website or on a third-party publisher — directly back to a purchase event provides a level of accountability that brand campaigns running on social or programmatic channels rarely offer.
• Pressure on co-op budgets has pushed brands to demand more from their trade marketing investments. Commerce media offers a natural home for co-op dollars that previously funded in-store displays or circular ads, while delivering the digital measurement rigor that modern CFOs expect.

The Role of Retail Media Networks in the Commerce Media Ecosystem

Retail media networks remain the foundation of the commerce media ecosystem, but their role is evolving. The most sophisticated networks — including those operated by Amazon, Walmart, Target, and a growing roster of grocery and specialty retailers — are no longer simply selling on-site sponsored product placements. They are building full-funnel advertising platforms capable of delivering display ads, video pre-rolls, connected TV campaigns, and off-site programmatic inventory, all powered by first-party shopper data.

This expansion of capabilities is transforming retail media networks from tactical advertising vehicles into strategic media partners. For brands, this means the conversation with a retailer is no longer purely transactional. It involves joint business planning, audience strategy, creative development, and sophisticated measurement frameworks that tie media investment directly to sales lift and category growth.

Challenges That Still Need to Be Addressed

Despite its remarkable momentum, commerce media still faces meaningful challenges that the industry must collectively address to sustain its growth trajectory. Standardization of measurement across retail media networks remains a significant pain point. Without consistent definitions of key performance indicators — reach, frequency, attribution windows, incrementality — it is difficult for brands to compare performance across networks or make confident budget allocation decisions.

Fragmentation is another persistent issue. The proliferation of retail media networks has created a complex buying landscape where advertisers must manage dozens of separate platform relationships, each with its own technology stack, reporting interface, and minimum spend requirement. Aggregation solutions and interoperability standards are beginning to emerge, but the market is still far from the streamlined experience that brands and their agencies are seeking.

The Future of Commerce Media: Working Media at Scale

The trajectory of commerce media points toward a future in which the distinction between "working media" and "trade investment" largely disappears. As retail media networks mature and expand their off-site capabilities, commerce media will increasingly function as a unified channel that serves both brand-building and performance objectives simultaneously.

For marketers willing to invest in the organizational capabilities — data infrastructure, measurement sophistication, retailer partnerships — needed to navigate this landscape, commerce media represents one of the most significant strategic opportunities in advertising today. The walled gardens have not disappeared, but the walls are getting lower, and what lies beyond them is increasingly worth exploring.