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

The Advertising Channel Quietly Reshaping Billions in Budgets

In less than a decade, retail media has undergone one of the most dramatic transformations in modern advertising history. What began as a relatively modest monetization tactic — a way for margin-pressured mass retailers to extract a little more revenue from their brand partners — has become one of the fastest-growing channels in the entire digital advertising ecosystem. Billions of co-op dollars have followed, and the momentum shows no sign of slowing. But as the channel matures, a more nuanced story is emerging: one about the rise of commerce media, the limits of walled gardens, and the growing demand for advertising that truly works.

What Is Commerce Media and How Did We Get Here?

Commerce media is the evolution of retail media — a broader, more sophisticated framework that connects advertising investment directly to commerce outcomes across a wider range of environments. While retail media historically referred to sponsored placements within a retailer's own digital property (think Amazon search results or a Walmart product listing page), commerce media extends that principle into off-site programmatic channels, social platforms, streaming environments, and beyond.

The distinction matters. Retail media, in its original form, was largely a closed system. Brands paid to appear within a single retailer's ecosystem and received measurement data filtered through that same retailer's reporting tools. Commerce media, by contrast, aspires to something more open, more portable, and more performance-oriented — connecting purchase signals from retail environments to media activation across the broader digital landscape.

Understanding this evolution helps explain why major holding companies, independent agencies, technology platforms, and retailers themselves are all racing to define their place in this new landscape.

Why Retail Media Attracted Billions in Brand Spend

The initial appeal of retail media was straightforward and hard to argue with. Retailers sit on some of the most valuable first-party data in existence: actual purchase behavior. Unlike audience segments built from browsing patterns or demographic proxies, a retailer's shopper data reflects what people genuinely buy, how often they buy it, and what else they purchase alongside it. For brands trying to reach in-market consumers at the moment of purchase intent, that signal is extraordinarily valuable.

Closed-loop measurement sweetened the deal further. For the first time, marketers could link an advertising exposure directly to a sales transaction within the same ecosystem. The ability to say "we spent X and sold Y" — without relying on modeled attribution or panel-based estimates — was a compelling proposition for brand and performance teams alike. It accelerated the migration of co-op advertising funds, which had traditionally flowed through trade promotions and manual allowance structures, into digitally trackable retail media placements.

The Problem With Walled Gardens

Despite the enthusiasm, cracks began to appear in the retail media model fairly quickly. The very feature that made retail media appealing — its closed-loop, walled-garden nature — also became its most significant limitation.

• Measurement fragmentation: Each retailer built its own reporting infrastructure, with its own definitions, attribution windows, and success metrics. Comparing performance across Amazon, Walmart Connect, Kroger Precision Marketing, and a dozen other networks became an analytical nightmare for brands managing multi-retailer strategies.
• Inventory quality concerns: As retail media networks proliferated, so did questions about whether all placements were truly driving incremental sales or simply capturing purchases that would have happened anyway.
• Margin pressure on retailers: Smaller retail media networks struggled to deliver the audience scale needed to justify premium CPMs, creating a bifurcated market where only the largest players could compete meaningfully.
• Lack of standardization: Without common measurement standards, brands found it difficult to hold retail media to the same accountability benchmarks applied to other digital channels.

These pain points created the conditions for commerce media to step in and offer something more coherent: a philosophy of connecting commerce data to media activation in ways that are measurable, portable, and independent of any single retailer's reporting ecosystem.

Commerce Media as the Next Competitive Frontier

The shift from retail media to commerce media represents more than a semantic upgrade. It signals a fundamental change in how the industry thinks about the relationship between advertising and commercial outcomes. Rather than treating retail media as a single channel with discrete inventory, commerce media treats purchase-intent data as a strategic asset that can power advertising across every touchpoint in a consumer's journey.

This opens up significant opportunities for brands willing to invest in the infrastructure required to participate. First-party data strategies, clean room partnerships, and identity resolution capabilities are all becoming table stakes for brands that want to activate commerce media at scale without being entirely dependent on any single retailer's walled garden.

For agencies and technology partners, commerce media creates a new advisory mandate: helping brands navigate a fragmented but opportunity-rich landscape, find the right mix of on-site and off-site retail media activation, and build measurement frameworks that can withstand scrutiny across retailer, finance, and marketing leadership teams.

What Brands and Marketers Should Do Now

The rise of commerce media rewards those who move from passive co-op spending to deliberate, strategy-led investment. A few priorities stand out for brands looking to position themselves well.

• Audit your retail media mix: Not all retail media networks deliver equal value. Assess scale, measurement transparency, and audience quality before allocating budget.
• Demand standardized measurement: Push retail media partners to align on industry measurement standards being developed through bodies like the IAB and MRC.
• Invest in first-party data infrastructure: Commerce media favors brands with rich customer data. Building clean, consented, and actionable first-party data assets is a long-term competitive advantage.
• Think beyond the retailer's walls: The real promise of commerce media is off-site activation — using retail purchase signals to reach shoppers wherever they spend their time, not just inside a retailer's app or website.

The Road Ahead for Commerce Media

Commerce media is not a passing trend. It is the logical outcome of two powerful forces colliding: the deprecation of third-party cookies forcing advertisers toward first-party and contextual data signals, and the rise of retailers as significant media businesses in their own right. As these forces continue to reshape digital advertising, commerce media will increasingly sit at the center of how brands connect with consumers who are ready to buy.

The brands and agencies that treat this moment as a strategic inflection point — rather than simply a new line item in an existing media plan — are the ones most likely to build durable competitive advantages. Working media, in the truest sense of the phrase, is the goal. Commerce media, done right, is the path to get there.