How a Walmart Seller Reaches You on CNN
April 2026
From step 4 of the 150ms ad auction: Walmart wins the bid because it recognizes you as one of its shoppers. But who is the actual advertiser — and how does a product listing end up on CNN?
A seller sets up a campaign on Walmart Connect
KicksCo — a sneaker brand selling on Walmart's marketplace — creates an ad campaign. They set a budget, select their products, and point to 'Walmart sneaker shoppers' as their target audience. They don't pick websites. They don't buy ad slots. They just describe who they want to reach.
Walmart narrows 45 million shoppers down to the right 2.4 million
This is where Walmart's advantage becomes clear. Unlike Google or Meta, who infer interests from browsing, Walmart knows what people actually bought — and searched for — in its own store. That purchase history is first-party data no other DSP can access. KicksCo's audience is built entirely from it.
The user visits CNN — Walmart recognizes them and wins the auction
When someone in KicksCo's audience loads CNN, the page triggers a real-time auction. Walmart Connect receives the bid request, cross-references the anonymous signals against its shopper database, and recognizes this person. It bids $1.40 — more than the $0.45 and $0.62 from generic DSPs — and wins. KicksCo's sneaker ad fills the slot.
Everyone gets paid — the seller, Walmart, and CNN
The seller gets a qualified click from someone who already wanted their product. Walmart earns ad revenue from its campaign — monetizing its shopper data rather than selling it. CNN earns an impression fee it never had to negotiate for. One 150ms auction, three winners.
The seller never talks to CNN. They set a budget, Walmart's platform handles the targeting using its own purchase data, and the open web auction handles the rest. The seller just sees clicks and conversions in their dashboard.