Retail Media Networks: The New Ad Giants

The way you shop online has fundamentally changed, though you might not have noticed the mechanics behind it. Retailers are no longer just selling you groceries, clothes, or rides. They are selling you to advertisers. From Walmart to Uber, major companies are transforming into media powerhouses, building massive advertising platforms known as Retail Media Networks (RMNs). This shift represents one of the biggest changes in the business world in the last decade.

The Gold Rush for First-Party Data

To understand why every store has suddenly launched an ad network, you have to look at the crumbling state of traditional digital tracking. For years, brands relied on third-party cookies and tracking pixels to follow you around the internet. If you looked at a pair of shoes on one site, that shoe brand would follow you to a news site to show you an ad.

That system is dying. Apple’s App Tracking Transparency (ATT) update effectively blinded Facebook and Instagram from seeing what users did off their apps. Google is also in the process of deprecating third-party cookies in Chrome.

This created a massive vacuum. Advertisers still need to know who to target, but they can no longer rely on external trackers. Enter the retailers.

Retailers possess the “Holy Grail” of advertising: First-Party Data.

• Target (Roundel) knows you just bought a crib, so you likely need diapers.
• Kroger (Kroger Precision Marketing) knows you switched from dairy milk to oat milk.
• Uber knows you are currently traveling to a hotel or a bar.

Unlike Google or Facebook, which use proxies like search history or likes to guess what you want, retailers utilize actual purchase history. This is hard data, not a guess.

Who Is Leading the Pack?

While Amazon invented this playbook, almost every major retailer has followed suit. Amazon’s ad business alone generates over $46 billion annually, earning more than YouTube. Now, the rest of the industry is playing catch-up.

Walmart Connect

Walmart aggressively rebranded its media arm to “Walmart Connect.” They are not just selling banner ads on Walmart.com. They are selling in-store audio ads, ads on self-checkout screens, and TV wall placements. In their 2023 fiscal reports, Walmart revealed that their ad business grew roughly 30%, generating nearly $3 billion.

Uber Advertising

Uber is a unique example because it sells mobility, not goods. However, they have a captive audience. When you are sitting in an Uber for 20 minutes, you are looking at your phone. Uber now sells “Journey Ads” that target you based on your destination. If you are heading to the airport, United Airlines can serve you an ad. If you are ordering Uber Eats, Pepsi can pay to appear at the top of your search results.

Marriott Media Network

Even hospitality is joining in. Marriott uses its vast database of traveler profiles to sell ads to partners like car rental agencies, airlines, or credit card companies. They know exactly when you are traveling and where you are staying, allowing for hyper-targeted advertising that Google simply cannot match.

The Profit Margin Secret

The second driver of this trend is simple economics. Retail is a notoriously low-margin business. Grocery stores, for instance, often operate on margins as thin as 2% to 4%.

Advertising, by contrast, is a high-margin product. When a brand like Tide pays Kroger to place their detergent at the top of a search result, the cost to Kroger is negligible. The margins on retail media can range from 70% to 90%.

For a company like Instacart, the ad platform is essential to profitability. While they might break even or lose money on the actual delivery of groceries, the fees brands pay to be “featured products” in the app generate pure profit. This creates a dual revenue stream where the media network subsidizes the retail operations.

How the Ads Actually Look

You see these ads every day, often without realizing they are paid placements.

1. Sponsored Search: When you search “running shoes” on Amazon or Dick’s Sporting Goods, the first three results are usually “Sponsored.” Brands bid against each other for these slots.
2. Display Banners: These are standard visual ads on the homepage or checkout page of a retailer’s site.
3. Off-Site Extension: This is sophisticated. Retailers take their data and buy ads on the open web (like CNN or The Weather Channel) on behalf of a brand. For example, Home Depot can help Milwaukee Tools show ads on ESPN.com, targeting only people who recently bought lumber at Home Depot.
4. In-Store Digital: Cooler screens (digital doors on freezers) and checkout aisles are becoming digital billboards. Walgreens tested digital cooler doors that display ads for ice cream as you walk by, replacing the transparent glass.

The Future: Fragmentation and Consolidation

The explosion of RMNs has created a new problem: fragmentation. A brand like Coca-Cola used to buy ads on TV and Facebook. Now, they are being asked to buy ads separately on Walmart, Target, Kroger, 7-Eleven, and Dollar General.

Managing dozens of different media networks is difficult for advertisers. We are starting to see consolidation and partnerships. For example, Roku has partnered with Kroger. This allows a brand to show a TV commercial on Roku, targeting households that Kroger knows are loyal buyers of that brand.

The market is expected to grow rapidly. eMarketer predicts that US retail media ad spending will exceed $100 billion by 2025. It is no longer a side project for retailers; it is a core pillar of their survival strategy.

Frequently Asked Questions

What is the difference between Amazon Ads and other RMNs? Amazon was the pioneer and has the largest scale because of its massive traffic volume. Other RMNs (like Walmart or Target) are playing catch-up but offer the advantage of connecting online ads to physical in-store sales, which Amazon does less effectively.

Do these networks violate my privacy? Technically, no. This is first-party data collection. When you sign up for a loyalty card or create an account, you agree to the retailer’s terms. Since they own the data and the platform where the ad is shown, they do not need to share your personal info with outside parties to make the targeting work.

Why are brands shifting money from TV to Retail Media? It comes down to “closed-loop attribution.” If a brand runs a TV ad, they don’t know for sure if it caused you to buy the product. With Retail Media, if you click a sponsored product on Instacart and add it to your cart, the advertiser knows instantly that the ad worked. The return on investment is measureable and clear.

Are there Retail Media Networks for non-retail companies? Yes. Chase Bank (Chase Media Solutions) and United Airlines have launched media networks. Any company with a large user base and logged-in transaction data can theoretically build an ad network.