Audience extension

Audience extension is a publisher's or retailer's practice of reaching its own known audience on other sites, apps and screens, by buying media elsewhere and targeting people it has identified in its first-party data.

The practice began with publishers that had sold out their own pages. They kept selling their readers by finding them on the open web through a DSP. Retail media turned it into a large business under the name offsite media. Some retailers also send the same audiences to search engines and social platforms, which match the IDs to their own users. The retailer onboards shopper IDs to a DSP or identity partner, buys inventory across channels for a brand, then closes the loop by matching exposed shoppers to sales.

For the brand, the value is the retailer's data and its sales measurement. The costs are the media, the retailer's fee and the DSP's fee, so buyers ask how much of the price reaches the publisher. They also ask which supply paths the retailer uses and how it counts sales.

Example: Lowe's Media Network, renamed from Lowe's One Roof Media Network in 2024, runs programmatic campaigns for brands across display, video, CTV, streaming audio, podcasts and digital out-of-home through Yahoo DSP. It also places brand ads in email, paid search and social channels with partners including Google, Meta and Pinterest. Lowe's says the network reaches more than 120 million unique customers, a company claim (Path to Purchase Institute, 9 August 2024).

Related terms: offsite media, retail media network, lookalike audience, closed-loop measurement, DSP, identity resolution.

Authoritative source: Path to Purchase Institute, "Lowe's Rebrands Retailer Media Network" (9 August 2024).

Read the full guide: Offsite retail media explained: data flows and clean room requirements.