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What a retail media network actually is

A retail media network is, stripped of jargon, a retailer selling advertising space to the brands it already sells products for — using the data it already collects from its own customers. That is the whole idea. Everything else is implementation.

It works because a retailer sits on two assets that traditional media companies have to rent: a large, logged-in audience of people in a buying mindset, and first-party data about what those people actually purchase. When third-party tracking became harder and less reliable, that owned, consented data went from a back-office record to a media product.

The two halves: on-site and in-store

• On-site retail media is advertising on the retailer's own digital property — sponsored products in search results, banners in the app, promoted items on category pages. It is the larger, more mature half because it inherits clean digital measurement.
• In-store retail media is advertising in the physical store — shelf-edge displays, endcap and counter screens, large-format signage. It is younger and harder to measure, but it reaches the shopper at the decisive last moment.

Both run on the same underlying logic — the retailer's audience and data — but they are sold, priced, and measured differently, and a network usually grows one before tackling the other.

Why retailers bother

Retail is a thin-margin business. Media is a high-margin one. A retail media network lets a retailer earn advertising-style margins on traffic it was already paying to attract, which is why the category grew from a niche into a board-level priority so quickly. For brands, the appeal is closing the loop: advertising spent at the point of sale, measured against actual purchases rather than proxies.

What it is not

A retail media network is not simply "ads in our store." The difference is the data spine: the ability to target, and ideally to measure, against real first-party purchase behaviour. A retailer that bolts screens onto walls without that data layer has an advertising channel, not a retail media network — and it should price it accordingly.

Next: where physical screens fit, and the software that runs them →