In-Store Retail Media Explained for 2026: What CMOs Should Know

The Aisle Became a Media Buy

Walk the center aisle of a big-box grocery store this month and you will pass a cooler door running video loops, a shelf-edge tag pushing a two-for-one on frozen pizza, and an endcap that a snack brand paid for the way a company buys a highway billboard panel. That's in-store retail media, and it is now a real, budgeted line item, worth roughly $2.6 billion of a US retail media market that eMarketer projects will clear $70 billion in 2026, a market that barely existed as a distinct category a decade ago.

The category covers more than screens. It includes digital shelf tags that swap prices and ads on a schedule, in-store audio spots timed to dayparts, sampling stations sponsored by a single brand, printed signage sold as inventory rather than given away as merchandising support, and cart-mounted or handheld scanner ads tied to a shopper's loyalty profile. What ties it together is the sales pitch: you are no longer buying shelf space, you are buying an impression the retailer can theoretically prove led to a basket.

• Cooler and freezer door screens (video, often motion-activated)
• Digital shelf-edge labels that rotate price and ad creative
• In-store audio and radio-style spots tied to store dayparts
• Sponsored endcaps and secondary displays sold as media, not just placement
• Sampling and demo events packaged with post-event purchase data
• Cart, scanner and self-checkout screen ads

That distinguishes it from the on-site retail media most CMOs already budget for, the sponsored search results and banner ads inside a retailer's app or website. On-site media still takes the vast majority of retail media dollars. In-store is the smaller, physical cousin, and it is the one being pitched most aggressively right now because it is the one retailers can still expand without competing head-on with Amazon's ad stack.

Who's Actually Selling the Space

Walmart Connect anchors the category by scale alone. Walmart's global advertising business, which Walmart Connect drives in the US, generated $4.4 billion in fiscal 2024, up 28 percent year over year, a figure the retailer disclosed in its own earnings release and one CNBC and other outlets covered closely because it showed a grocery chain outgrowing many pure-play ad platforms.

Kroger Precision Marketing sells its in-store network through 84.51°, the retailer's data and analytics arm, which matches loyalty card purchases back to media exposure to produce sales lift reports. That closed loop, card swipe tied directly to an ad a shopper stood in front of, is a genuine structural advantage over open web display or most out-of-home buys, where you are usually inferring behavior rather than observing it.

Albertsons Media Collective has pushed further into entertainment formats, running a scripted micro-drama inside its retail media inventory rather than sticking to straight product ads, a sign that in-store and on-site media are starting to blur into a single content strategy rather than two separate line items.

Sam's Club MAP, CVS Media Exchange and Instacart's expansion into physical store screens round out the field, and each has its own rate card, minimum spend and reporting cadence. If you're comparing quotes, it's worth cross-checking them against the retail media CPM benchmark table CMO Mag built for 2026, because rate cards alone rarely tell you what you'll actually pay after negotiated discounts.

The Measurement Pitch, Stress-Tested

The pitch you'll hear on a retail media sales call is almost always the same: we can prove sales lift because we own the register data. That's true, as far as it goes. A retailer that matches a loyalty card to a media exposure and then to a receipt has a cleaner causal chain than almost any other channel a CMO buys, including most digital display and nearly all traditional OOH.

Where the story gets shakier is comparability. There is still no industry-wide agreement on how to count an in-store impression, whether that's a cooler door playing a video near a shopper versus one actually noticed, and that gap is exactly why the IAB has been building retail media measurement guidelines with input from the Media Rating Council. Until those standards are widely adopted, a lift number from Kroger and a lift number from Walgreens are not the same currency, no matter how similar the dashboards look.

Walgreens' 2023 split from Cooler Screens, the startup that installed smart video screens on freezer and cooler doors across thousands of stores, is worth remembering here. The two sides disputed hardware costs and data terms, as Retail Dive reported at the time, and the deal wound down well short of its original ambitions. In-store hardware contracts carry real operational risk that a slide deck won't show you: store-level maintenance, shopper complaints about screen brightness, and IT support that a media sales rep isn't the one fielding.

You'll also still hear the old claim that 70 percent of purchase decisions get made in the store. It traces back to a Point-of-Purchase Advertising Institute study from the 1990s that has never been independently replicated at that scale, and shopper researchers have picked it apart for years. Treat any retail media pitch that leans on it as a sign you should ask harder questions, not fewer.

Is It Worth Your Budget

It's worth the spend for brands that can tie a campaign to a specific, high-margin SKU and want proof at the shelf, not for brands chasing broad awareness. If awareness is the job, you're often better served comparing the cost per impression here against other physical formats you already understand, including the math laid out in CMO Mag's piece on fleet graphics and their real cost per impression, or the format-by-format pricing in our out-of-home buyer's guide. In-store media usually costs more per thousand than either, and you should make the retailer justify that premium with data, not just proximity to the shelf.

Questions to put to any retailer sales team

• What's the holdout or control-store design behind your lift number, and can I see the raw store list?
• How is an impression defined for this specific format, is it played, viewable, or dwell-time verified?
• Can I get exposure logs at the SKU and store level, not just a rolled-up summary report?
• What happens to my creative and data if the hardware vendor's contract with you ends?
• How does this rate card compare after standard first-time or multi-quarter discounts?

Running a Smart Pilot This Quarter

Don't roll a national in-store buy on the strength of one deck. Retailers will happily start you with a limited, well-instrumented test, and a good rep should welcome the request because it protects their own renewal case too.

1. Pick a single SKU with a clean, trackable margin and a known baseline sell-through rate.
2. Run the buy in a defined set of stores for 8 to 12 weeks, with a matched control set running no media.
3. Request raw exposure and sales data, not just the retailer's own summarized report.
4. Compare the resulting cost per incremental unit against your other physical channels, not just against last year's assumptions.
5. Decide on renewal terms before the pilot ends, so a good number doesn't get negotiated away under deadline pressure.

If you're building the broader case for physical formats inside a 2026 budget review, it helps to see how peers are actually allocating. CMO Mag's 2026 budget poll of 30 marketing leaders shows where retail media sits next to search, social and traditional OOH in real spending plans, and it's a useful gut check before you commit to a multi-quarter retailer contract. For the measurement side of the argument, our comparison of attribution models for 2026 budgets is a good companion read, since retail media's closed-loop pitch only holds up if you're applying the same rigor you'd demand from any other channel.