Commerce media networks are on pace to pull in more than $60 billion in ad spend this year, according to eMarketer estimates, and every retailer with a checkout page suddenly wants a piece of it. But ask a media buyer to compare campaign performance across three commerce media platforms using the same metric, and watch the silence. Bigger budgets, murkier measurement. That’s the trade brands are quietly making right now.
Commerce Media’s Budget Grab Is Real
Walmart Connect, Instacart Ads, Kroger Precision Marketing, Target Roundel: the roster keeps growing, and so does the pitch. Retailers are sitting on first party purchase data that Google and Meta can only dream about post cookie deprecation. That data lets them promise something search and social can’t: closed loop attribution from ad impression to actual cart.
Brands have responded by shifting budget fast. Beauty, CPG, and grocery advertisers in particular are moving dollars out of upper funnel display and into commerce media line items, betting that proximity to the purchase moment beats reach. It’s not an unreasonable bet. It’s just one that’s hard to verify at scale.
The pattern echoes what we’ve already seen play out in retail media budget shifts, where creator and influencer dollars started getting reclassified as retail media spend simply because the retailer offered a dashboard. Commerce media is the broader umbrella: not just retail shelves, but ride share apps, food delivery platforms, fintech apps, and travel marketplaces all building out their own ad stacks.
Why Measurement Can’t Keep Up
Here’s the uncomfortable part. Every commerce media network defines “conversion” differently. Some count a view through sale within seven days. Others stretch that window to thirty. Some report incremental sales lift using their own proprietary modeling that brands can’t audit. Ask for raw log level data and most networks will point you to a self serve dashboard instead.
A brand running the same campaign across four commerce media networks can get four different definitions of “success” and zero apples to apples comparison between them.
That’s not a hypothetical. Marketers at agencies managing multi retailer commerce media programs describe reconciling reports manually in spreadsheets because there’s no shared taxonomy. Contrast that with the standardized reporting brands expect from Google Ads or Meta’s Meta Business Suite, and the gap becomes obvious. Commerce media is still operating like walled gardens did a decade ago, except now there are a dozen gardens instead of two.
The Walled Garden Problem, Again
Retail media networks love to talk about closed loop measurement as their killer feature. And it is powerful, in theory. The catch is that “closed loop” often means closed to outside verification too. Brands are asked to trust the retailer’s own attribution model, with limited ability to layer in independent measurement vendors or compare results against a media mix model built on non retail data.
This is the same trust deficit we’ve flagged in independent benchmarking for AI vendors. When the entity selling you the media is also the entity grading its own homework, skepticism is the rational default. Procurement teams are starting to ask commerce media reps the same question they ask influencer platforms: who audits your numbers, and can we see the methodology?
Some networks are responding. A handful now support integrations with third party measurement firms and offer clean room access for advertisers willing to pay for it. But adoption is uneven, and smaller commerce media players (think regional grocery chains or niche delivery apps) often lack the infrastructure to offer anything beyond a basic dashboard export.
What Brands Are Actually Doing About It
Smart marketing teams aren’t waiting for the industry to standardize. They’re building workarounds now.
- Insisting on contract level measurement clauses. Some brands now write minimum reporting standards into commerce media contracts, similar to the vendor term renegotiations we covered around the NewEngen and Grapevine deal.
- Running holdout tests. Geo based or audience based holdouts let brands estimate incremental lift independent of the network’s own claims.
- Centralizing spend in fewer networks. Rather than spreading budget across ten commerce media platforms, some teams are consolidating into the two or three with the most transparent reporting, sacrificing reach for measurement confidence.
- Pairing commerce media with brand lift studies. A handful of advertisers now commission third party brand lift research to validate what the network’s dashboard reports.
None of this fully solves the problem. But it buys marketing teams enough confidence to keep budgets flowing without flying completely blind.
Is Commerce Media Just Retail Media With a Rebrand?
Not quite, and the distinction matters for budget planning. Retail media specifically refers to ad inventory sold by retailers on their own properties, think sponsored product listings on a grocery app. Commerce media is broader: it includes any platform where a transaction happens, from ride share apps to buy now pay later services to livestream shopping platforms.
That broader definition is exactly why measurement is such a mess. A grocery retailer, a fintech app, and a livestream shopping platform (the kind gaining traction as covered in our piece on livestream shopping and retail media) all define “commerce” and “conversion” differently. There’s no IAB style standard yet that unifies reporting across these formats the way there is for display or video.
Industry groups are working on it. Expect movement toward shared taxonomy standards over the next couple of budget cycles, but don’t expect it to arrive before your next quarterly review.
The Path Forward: Standardized Metrics or Bust
Commerce media isn’t going away. If anything, AI driven shopping agents and answer engines are going to make transaction level ad inventory even more valuable, a trend we’ve tracked closely in coverage of AI agent orchestration in marketing. But the current measurement gap creates real risk for brands that can’t defend their spend to finance leadership.
Budgets are moving faster than the reporting standards needed to justify them, and that’s a problem finance teams will eventually force marketing to solve.
The networks that win the next wave of commerce media budget won’t necessarily be the ones with the most inventory. They’ll be the ones willing to open up their attribution methodology, support third party verification, and speak the same measurement language as the rest of the ad stack. That’s a lesson retail media networks are learning slowly, and one the broader commerce media category needs to learn fast. For a wider view of how AI and budget maturity intersect across marketing functions, see our analysis of AI marketing spend and budget maturity gaps.
Marketers evaluating new platforms should also check baseline resources like HubSpot’s marketing measurement guides and Statista’s retail media data to benchmark network claims against broader industry figures before committing incremental budget.
Frequently Asked Questions
What is commerce media, and how is it different from retail media?
Commerce media refers to advertising sold across any platform where a transaction occurs, including retailers, delivery apps, fintech services, and livestream shopping platforms. Retail media is a subset focused specifically on inventory sold by retailers on their own digital properties.
Why is measurement inconsistent across commerce media networks?
Each network uses its own attribution windows, conversion definitions, and proprietary lift modeling, and there’s currently no industry wide standard forcing them to report in a comparable way. This makes cross network comparisons difficult for brands managing multiple partnerships at once.
How can brands verify commerce media performance claims?
Brands can request clean room access, commission independent brand lift studies, run geo or audience holdout tests, and negotiate minimum reporting standards directly into vendor contracts before committing significant budget.
Will commerce media measurement standards improve soon?
Industry groups are working toward shared taxonomy and reporting standards, but adoption is uneven and likely to take multiple budget cycles before smaller networks catch up to more established players.
Should brands pull back on commerce media spend until measurement improves?
Most brands are not pulling back entirely, but many are consolidating spend into fewer networks with more transparent reporting rather than spreading budget thin across platforms with unverifiable claims.
The bottom line: before your next commerce media renewal, demand a written measurement methodology and at least one independent verification option in the contract. If the network can’t provide either, treat the spend as a test budget, not a core channel, until it can.
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