Retail media is the fastest-growing line on the plan and the least honestly counted. Bought against contribution, it is a weapon. Bought against platform ROAS, it is often trade spend in new clothes.
Every retailer now sells media against its shelf, and the pitch is seductive: closed-loop measurement, purchase data, sales you can see. The trap is in what the ROAS captures. Sponsored placements sit directly on demand that already existed — a shopper searching your brand on the retailer’s site was, in large part, buying anyway. The platform books the sale to the ad; the P&L just paid margin for it.
Bought against contribution, retail media is a weapon. Bought against platform ROAS, it is trade spend in new clothes.
Count it like everything else
The discipline is the same as the rest of the plan, applied per network: incrementality measured at the SKU and category level — holdouts and geo designs that separate captured demand from created demand — and the network priced against contribution after margin and fees, never against its own scorecard. Some placements clear that bar easily: new-to-brand demand, share capture at a shelf where a competitor was winning, categories where discovery genuinely happens on the retailer’s search bar. Others reveal themselves as a tax on your own base.
The shelf that matters next
The digital shelf is also where machine buyers already operate — agents comparing products read the same feeds and placements. A retail media line counted honestly today is the beachhead for agentic demand tomorrow, on terms the evidence sets. Negotiate with the incrementality numbers in hand; the networks respect an advertiser who brings their own count.
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