Consider a retailer’s most valuable customer: someone who orders regularly, has a long purchase history, and responds well to relevant offers, yet rarely browses the retailer’s website between purchases. They spend most of their time online reading news, watching video, and scrolling social feeds, and that is where their next purchase decision begins to take shape.
Most retail media, however, still centers on the website. According to EMARKETER’s report Retail Media’s Off-Site Imperative, nearly 80% of retail media ad spending goes to retailers’ own sites and apps, even as the largest networks approach the limits of that inventory.
1. Where on-site growth levels off
On-site placements remain a natural starting point for retailers and publishers, reaching shoppers as they browse. Yet this model can only grow as fast as traffic does, leaving customers like the one above out of reach.
1. Taking first-party data to where shoppers are
Off-site commerce media closes that gap by carrying first-party data into the sites and apps where shoppers spend their time. A brand can then reach a confirmed pet owner on a lifestyle publication or a regular coffee buyer in a mobile app, guided by real purchase behavior. For data owners, the entire customer base becomes addressable inventory, not only today’s visitors.
Advertisers have taken notice: during this year’s EMARKETER Commerce Media Trends Summit, it was outlined that US off-site retail media ad spending will reach $17B+ in 2026, up 29.5% year over year.
1. Turning reach into proven results
That growth depends on proof, because off-site audiences command premium budgets only when performance can be demonstrated. Closed-loop attribution provides it, matching ad exposure against actual purchases within a privacy-safe clean room so advertisers see verified outcomes instead of modeled estimates.
1. Bringing it together
This is the thinking behind ClearLoop by Commerce Media Tech, which unites a customer data platform, a demand-side platform, and a clean room in a single private-labeled system. Data owners can launch on-site and extend to off-site, walled garden, and open web reach as their network matures, while keeping full ownership of their data.
The most valuable shopper may never visit your website, but that no longer puts them out of reach. With first-party data working beyond owned channels, every known customer becomes an audience worth reaching, wherever their attention is.
