The Metric Retailers Grade Themselves On

Target is pitching an ad metric designed to show that its retail media network drives sales. According to Adweek, an executive at the company has conceded that most brands aren't fully on board with it. That is an unusually candid admission to make in public, and it is worth sitting with, because it is not a complaint from a disgruntled outside analyst. It is a retailer's own representative saying, in effect: we built the ruler, and the people we're measuring don't trust it.

The timing sharpens the point. MarTech's reporting on the category this week carries the headline that retail media budgets are growing while advertisers' patience isn't. Put those two stories side by side and you get the actual story of retail media in 2026: a channel that keeps winning bigger allocations from marketing budgets even as the people writing the cheques become more openly sceptical of the numbers they're shown to justify it.

Who grades the homework

Retail media's basic structure is unlike almost any other advertising channel. When a brand buys a display ad on a publisher's site, or a paid search placement, there are third-party measurement layers, independent verification standards, and years of industry argument about attribution that at least happened in the open, among parties with competing interests. Retail media collapsed that structure. The retailer sells the inventory, the retailer sits on the first-party sales data, and increasingly the retailer builds the metric that tells the brand whether its spend worked.

Target's new metric is simply the most visible recent example of that pattern. It is not unique in kind, only in the fact that an executive admitted, on the record, that the brands being asked to adopt it aren't convinced. Most retail media measurement products are adopted more quietly, folded into renewal conversations where a brand's choice is less "do I trust this number" and more "do I want to keep my shelf placement and data access." That is not really a measurement market. It is a sales relationship wearing measurement's clothes.

Growth without the argument being settled

What makes the MarTech finding uncomfortable for retailers is that the money is still flowing in. Budgets are growing. If the measurement problem were actually disqualifying, you'd expect the growth to stall while the industry fought the argument out, the way paid search and programmatic display both went through their own credibility fights before standards hardened. Retail media hasn't had to have that fight yet, because retailers control enough of the distribution, the shelf, and the data that brands can object to the metric while still increasing the budget line that depends on it.

That is not a sustainable position so much as a temporary one. Patience, as MarTech's framing has it, is not the same as budget. Patience is the thing that runs out first, while the money keeps moving on inertia and fear of losing placement. When patience runs out entirely, the budget follows, usually faster than anyone predicted, because nobody wants to be the last brand still trusting a number everyone else has quietly stopped believing.

A dispute that looks familiar from other channels

Marketing has been here before, just not in retail media. MarTech's separate piece on email marketing's history argues that the channel's own governance fights, over deliverability, spam standards, and who gets to define a "sent" or "delivered" email, eventually forced an external standard-setting process because self-reporting by senders wasn't credible enough on its own. Retail media is earlier in that arc. Right now the retailer is still both the sender and the standards body, and the Target example shows brands noticing that arrangement out loud rather than accepting it quietly.

There's also a useful, if indirect, parallel in how regulators have started treating other industries' self-serve numbers. The FTC's recent warning to auto dealers about price transparency isn't about advertising metrics, but it rests on the same underlying irritation: a seller's own disclosed figures looking favourable to the seller in ways that don't hold up under outside scrutiny. New York City's proposed POWER Act, aimed at unfair and abusive business practices more broadly, points the same direction, an appetite for forcing sellers to justify the numbers they publish about their own performance. Retail media hasn't attracted that kind of regulatory attention yet, and there's no evidence in current reporting that it will. But the pattern of other industries getting pulled toward independent verification once sellers' self-graded numbers start drawing public scepticism is exactly the pattern Target's admission fits into.

What brands should actually ask for

The fix here isn't complicated to describe, even if it's hard to win. Brands need measurement standards that retailers don't build alone and can't quietly revise when the results stop flattering the channel. That means third-party verification, published methodology, and ideally a standards process that looks more like the deliverability fights email marketing eventually settled than like a retailer rolling out its own in-house metric and asking brands to adopt it on faith.

None of that happens while budgets keep growing regardless. The uncomfortable truth in this week's reporting is that advertisers have more leverage than they're using. An exec admitting "most brands aren't fully on board" is a retailer telling on itself. The appropriate response to that admission isn't a stronger pitch deck for the new metric. It's brands asking, collectively and loudly, why they're still letting the seller mark its own homework.