Retail Media Network (RMN)

A retail media network turns a store's shelf into an ad platform. Retailers — Amazon Ads, Walmart Connect, Target's Roundel — monetize their sites, apps, and, crucially, their first-party purchase data by selling ads to the brands they carry. It's the fastest-growing category in digital advertising, a market now worth well over $100 billion globally.

The appeal is closed-loop measurement: the retailer sees the ad and the purchase, so brands can tie spend directly to sales.

The frontier is where retail media meets AI. As shopping assistants and agentic commerce route more purchases through AI, the "shelf" is becoming the answer inside a chatbot. Brands fluent in retail media already understand the discipline coming next — earning presence at the exact moment of the buying decision.