How do you find DOOH inventory that includes both screens and ads?

Short answer

Use a DSP or OOH marketplace that integrates screen-level data with available ad slots. Filter by venue type, location, and daypart, then choose direct, programmatic, or hybrid buying. The key is selecting a platform that shows both the physical screen placement and the impression-based ad slots running on it.

Screens and ad slots are two distinct things you need to buy

DOOH inventory has two interconnected components that advertisers must account for separately.

Screens are the physical or virtual digital displays installed in locations such as roadside billboards, transit shelters, gyms, retail stores, gas stations, airports, bars, restaurants, and office lobbies. Choosing a screen means choosing a placement, a venue context, and a potential audience.

Ad slots are the time-based impressions within a screen's rotation or loop. Unlike traditional out of home, DOOH rarely means exclusive, full-time ownership of a display. Instead, advertisers buy impressions or time segments shared across multiple advertisers in a loop. Pricing follows from audience volume, location quality, and daypart rather than a flat weekly rate.

Buying DOOH inventory therefore means securing access to specific screens and the ad slots that determine how often and to whom your creative appears. Platforms that surface only screen locations without showing available impressions leave a critical gap in planning.

Where to find inventory that shows both

Programmatic DOOH has simplified discovery by aggregating inventory from multiple media owners through supply-side platforms (SSPs), accessible to advertisers through demand-side platforms (DSPs). SSPs are used by media owners to list and manage screens and available ad slots in real time. DSPs give advertisers a single interface to search, filter, bid, and optimize across multiple SSPs.

Practical options include DOOH-specific DSPs as well as omnichannel DSPs with DOOH capabilities. Map-first inventory discovery tools let advertisers visually explore digital screens by location, venue type, and media owner, displaying available impressions alongside screen details to simplify activation. When selecting a DSP, consider geographic coverage, integration with your existing buying systems, reporting quality, and operational ease.

Common screen and venue categories available through these platforms include:

• Roadside digital billboards and bulletins visible to drivers and pedestrians
• Transit displays at bus shelters, transit stations, and on-bus screens
• Retail and grocery store displays near checkout or aisles
• Gas station and convenience store screens
• Gyms and fitness centers
• Bars and restaurants with digital signage
• Airports, malls, clinics, pharmacies, and other high-dwell place-based networks

Direct, programmatic, or hybrid buying

Once you have located inventory, you choose how to transact.

Direct buying means negotiating with media owners to secure specific screens, dates, and ad share. It is best suited to premium or high-profile placements and longer-term contracts, and it may offer a dominant or exclusive presence on a given screen.

Programmatic buying uses a DSP to bid on ad slots across aggregated screens from SSPs. It enables rapid activation, the ability to pause or modify a campaign mid-flight, audience and contextual targeting, and cross-network comparisons within a single platform. It is the better fit for broad reach and budget flexibility.

Many advertisers use a hybrid approach: direct buys for flagship screens combined with programmatic to extend reach efficiently. Neither method is universally superior; the right choice depends on campaign goals, budget, and how much control you need over specific placements.

Evaluating inventory quality and measuring results

Not all DOOH inventory is equal. Seek networks that provide defensible, measured audience metrics rather than purely modeled estimates. Before committing to a buy, ask how audience is measured, whether the network can provide transparent reporting by screen and time, and which DSPs and SSPs the network integrates with. Request proof-of-play logs, viewability data, and impression verification to ensure brand safety and confirm delivery.

Because DOOH does not support direct clicks, measurement relies on exposure-based approaches. Common methods include branded search lift (tracking increases in brand-related online searches after exposure), foot traffic attribution (monitoring device visits near screens that later visit a store), reach and impression metrics, dwell time, and geo-retargeting of exposed audiences online. Real-time campaign reports let you optimize placements, budgets, and creatives during a live flight rather than waiting until it ends.

DOOH also integrates well into omnichannel strategies. Placing screens along commuting routes and then retargeting exposed audiences with digital ads online creates a connected brand experience across physical and digital touchpoints.

How AdQuick handles DOOH inventory discovery

AdQuick brings screen-level placement data and available ad slots together in one platform, so advertisers can plan and buy without stitching together separate tools. You can explore billboard advertising across venue types and geographies using map-based search, filter by location and format, and choose between direct and programmatic buying depending on your campaign goals. Measurement tools built into the platform support foot traffic attribution and exposure reporting, giving you the data needed to optimize during a campaign rather than after it.