What Is Retail Media?

Retail media is advertising sold by a retailer or commerce platform against its own owned digital properties and shopper data, rather than advertising bought on the open web or on a social platform. The advertiser pays to reach shoppers inside or around a retailer's site, app, in-store screens, or off-site partner network, targeted using that retailer's first-party purchase history, and measured against the retailer's own closed-loop sales data.

What makes retail media different from other digital advertising?

Two things distinguish retail media from a standard programmatic buy. First, the targeting data comes from actual purchase and browsing behavior on the retailer's own platform, not from third-party cookies, device graphs, or modeled audiences, which makes it durable against cookie deprecation and generally more predictive of purchase intent. Second, measurement can close the loop between an ad impression and an actual transaction using the retailer's own point-of-sale and online order data, including in-store purchases in some networks, rather than relying on a modeled attribution window.

That closed-loop measurement is the core commercial argument for retail media budgets: a brand can see, with the retailer's own transaction records, whether a specific ad drove a specific sale, a level of certainty that most other digital channels cannot offer natively.

What formats does retail media inventory cover?

On-site inventory includes sponsored product listings inserted into search and browse results, display placements on category and product pages, and increasingly video placements. Off-site inventory extends the retailer's audience data to programmatic buys on the open web and connected TV, typically brokered through the retailer's own demand-side tooling or a partner DSP, so a brand reaches a shopper identified by the retailer's data even when that shopper is not on the retailer's own site. In-store inventory, where available, spans digital screens, shelf-edge placements, and audio, extending the same data-driven targeting into a physical environment.

What is the difference between a retail media network and a retail media management platform?

A retail media network is the retailer's own advertising product: the inventory, the first-party data, and the reporting all belong to that one retailer, and an advertiser buys directly or through that retailer's ad center. A retail media management platform sits above multiple retail media networks, connecting to each one's advertiser API to centralize campaign planning, bidding, pacing, and reporting from a single interface, which matters once a brand advertises across more than a handful of retailers and can no longer manage each one manually. Some tools in the second category also add algorithmic bid optimization and cross-retailer budget allocation that no single retail media network offers on its own.

A few names worth evaluating

Retail media spans direct retailer ad networks and the management layer that sits on top of them, and this is a non-exhaustive sample of both.

Walmart Connect is Walmart's own retail media network, giving advertisers access to roughly 150 million weekly U.S. shoppers through sponsored products, display, video, in-store digital and audio, and off-site programmatic inventory, bought either through Walmart's self-serve Ad Center or through agency-managed programs. Its closed-loop measurement links ad exposure to both online and in-store purchases using Walmart's own transaction data. As a single-retailer network, it has no cross-retailer planning or bidding tools; fee and take-rate structures are not published and require a direct conversation.

Skai Retail Media is a management layer connecting to more than 100 retail media networks, including Amazon, Walmart, Target, and Instacart, with API-level campaign management and unified reporting across all of them from a single interface. It documents automated cross-retailer budget pacing, dayparting, keyword harvesting, and hourly bid adjustments, and holds Amazon Ads verified partner and Walmart Connect preferred partner status. Formal incrementality testing and marketing mix model feed compatibility are not explicitly documented in public materials. Pricing is a custom quote, typically structured as a platform fee plus a percentage of managed spend.

Teikametrics focuses specifically on Amazon and Walmart rather than the full retailer set, using its Flywheel platform to run algorithmic, hourly bid adjustments and to connect organic and paid performance signals, including pausing ads automatically for out-of-stock products. Its reporting relies on the two retailers' own platform-attributed metrics (ROAS, ACoS) rather than independent incrementality testing, and it does not extend to other retail media networks such as Target Roundel or Instacart. Pricing tiers, including percentage-of-spend fee structures, are published on its site, which is more transparent than the category norm.

Where buyers get it wrong

The most common mistake is treating retail media as a single, homogenous budget line. Each retail media network has its own auction dynamics, minimum spend thresholds, data-sharing terms, and reporting depth, so a strategy built for one network's search-ad mechanics does not automatically transfer to another retailer's display or off-site product. Brands that scale past two or three retail media networks without a management layer or dedicated headcount typically find campaign quality degrading as manual, per-retailer management becomes unsustainable.

A second mistake is treating retailer-reported ROAS as equivalent to incremental sales. Retailer-side attribution is generally last-touch and measures correlation between exposure and a purchase the shopper was often already going to make, not the causal lift the ad created. Brands running meaningful retail media spend increasingly pair it with independent incrementality testing rather than relying solely on the retailer's own dashboard.

CartographAI runs independent, evidence-based assessments of retail media platforms and other adtech and martech categories, and the tool is free for buyers and agencies researching this category. For a comparison of what separates specific platforms once a shortlist is underway, see How to Evaluate a Retail Media Platform: What Separates the Tools.

FAQ

Is retail media the same thing as Amazon advertising? No. Amazon Ads is the largest single retail media network, but the category includes every retailer or commerce platform running ads against its own first-party shopper data and owned properties, including Walmart Connect, Target Roundel, Instacart Ads, Kroger Precision Marketing, and many others, plus the management platforms that operate across them.

Does retail media only run on a retailer's own website? No. Most major retail media networks now offer off-site inventory, extending the retailer's audience data to programmatic display and connected TV buys on the open web through a partner DSP or the retailer's own demand-side tooling, alongside the original on-site search and display formats.

How is retail media measured differently from other digital channels? Retail media networks can connect ad exposure directly to the retailer's own point-of-sale and online order data, producing closed-loop sales measurement, including in-store purchases at some retailers. Most other digital channels rely on modeled or third-party attribution rather than a retailer's own transaction records.

Do brands need a separate tool for every retail media network? Not necessarily. A brand advertising on one or two retailers can often manage campaigns directly through each retailer's own ad center. Once spend spreads across several networks, a cross-retailer management platform that connects to multiple retailer APIs becomes useful for centralizing bidding, pacing, and reporting.

Why has retail media grown so quickly? First-party, purchase-based targeting data has become more valuable as third-party cookies and mobile identifiers decline, and retailers hold exactly that kind of data at scale. Combined with closed-loop measurement that most other channels cannot match, that combination has pulled brand budgets toward retail media faster than most other digital advertising categories.