First‑party data, or 1P data, is information that a company collects and owns itself. This can include data from customer clubs and loyalty programs, CRM systems, websites and apps, in‑store systems, or the results of its own campaigns. In other words, it is data that comes directly from the company’s own customer relationships, and is therefore both more relevant and more reliable than purchased third‑party data.

When first‑party data is used in an OOH and DOOH context, the goal is to connect real customers to specific locations and tangible behaviours in the physical world. You move from abstract target‑group profiles to mapped customer patterns:

• where customers live
• where they work
• how they commute through the city
• where they shop, have coffee, and spend time in their everyday lives

By combining this insight with geographic information, advertisers can manage their out‑of‑home campaigns in a completely different way. In practice, it means they can select OOH locations that match where their own customer base actually moves, rather than relying on broad demographic assumptions. This makes OOH placement more precise: close to stores, in relevant retail areas, along key commuting routes, or around workplace clusters where existing or potential customers are present.

For DOOH, first‑party data unlocks additional opportunities. Digital screens can be managed more dynamically, and messages and impressions can be linked to specific CRM segments or defined geographic zones. A company can, for example, choose to show a particular message only near selected stores, to a specific loyalty segment, or at times of day when a relevant customer group has a high presence in the area. In this way, DOOH becomes more than “digital posters”; it becomes an extension of the operating model already used in digital channels.

This is what makes first‑party data so important for OOH/DOOH. When it is connected to geography and movement patterns, out‑of‑home media becomes a data‑driven part of the customer journey, rather than a standalone channel sitting alongside the rest of the marketing mix. OOH/DOOH can then be used to reinforce CRM strategies, extend the impact of campaigns in digital channels and create more integrated communication, where the customer encounters the same logic in different environments – both online and out in the city