Retail Media Has Reached its Accountability Moment

After years of rapid growth, new networks launching monthly, and brands eagerly shifting budgets closer to the point of sale, the conversation around retail media has evolved into one of accountability. Advertisers are asking harder questions about what retail media actually delivers, and whether reported performance aligns with real business outcomes.

This shift is both inevitable and healthy. Retail media’s early success was built on proximity to purchase and closed-loop measurement, a compelling alternative to probabilistic attribution elsewhere in digital advertising. However, as spend has increased the industry now faces a credibility test: Can retail media prove incremental impact across channels, not just efficiency within its own walls?

One challenge is structural. Many brands have discovered a mismatch between where products are sold and where media dollars are spent. A retailer may account for a meaningful share of unit sales, yet capture only a small fraction of that brand’s overall media budget. That gap isn’t necessarily irrational. It reflects how brands historically think about media as a growth driver.

Retail media networks, by contrast, have largely been positioned as lower-funnel tools. Sponsored listings, on-site display, and shopper marketing formats are effective, but they're inherently constrained. They optimize demand that already exists. As retail media has scaled, those constraints have become more visible, particularly for brands looking to drive penetration, consideration, or long-term brand equity.

In response, the largest players are evolving quickly. Rather than competing solely for shopper dollars, they're expanding into broader media offerings like off-site inventory, video, streaming, and upper-funnel formats designed to capture brand budgets historically reserved for national publishers and platforms. This shift reframes retail media as a full-funnel channel capable of influencing outcomes beyond immediate transactions.

That evolution raises an important question: How should success be measured?

Retail media reporting has traditionally focused on metrics that are easy to attribute within a closed ecosystem — return on ad spend, attributed sales, new-to-brand rates. While useful, these metrics often reflect correlation more than causation. They tell a story about what happened after exposure, but not what would have happened without it.

As brands push for greater accountability, they're increasingly comparing retailer-reported performance with their own internal data: total sales lift, market share changes, and cross-channel impact. Discrepancies between these views are fueling skepticism, even among committed retail media buyers. The result is a growing demand for measurement approaches that look beyond a single retailer’s ledger.

As a result, the conversation is rightly shifting toward outcomes.

True outcomes-based measurement doesn’t ask whether an ad drove a purchase in a specific environment. It asks whether media investment changed consumer behavior incrementally and across touchpoints. That’s a higher bar, and one that requires retailers, brands and media partners to rethink how value is defined and validated.

It also forces the industry to confront fragmentation. With dozens of retail media networks operating independently, brands are left stitching together performance narratives that don’t always reconcile. Each network may be “right” in isolation, but collectively incomplete. Without a more holistic view, retail media risks becoming a zero-sum game where dollars shift between networks without driving net growth.

Interestingly, this pressure is also reshaping how retailers think about media ownership. As traditional local and regional media businesses struggle, some see an opportunity for retailers to expand their owned-and-operated inventory in unconventional ways, extending reach beyond the store and into the communities they already serve. Whether or not that path proves viable, it underscores a broader trend: retail media is no longer confined to the digital shelf.

The next phase of retail media will be defined less by who has the most data and more by who can translate media exposure into credible, business-level outcomes. That means embracing independent measurement, acknowledging uncertainty, and resisting the temptation to oversimplify performance for the sake of short-term spend.

Retail media isn’t broken, but it is maturing. And like any maturing channel, its long-term success will depend on trust earned not through scale alone, but through transparency, rigor, and a shared definition of what growth really looks like.

Ben Kartzman is president and COO of Attain, where he helps brands and agencies use permission-based purchase data for real-time measurement, optimization, and customer growth.