Buying DOOH: direct booking, guaranteed deal or auction?
A digital screen can be booked in several ways. What matters is not which route sounds most modern, but what the campaign needs to secure: particular sites, an agreed volume or room to vary delivery. Separating these requirements before buying makes it easier to compare direct bookings, guaranteed deals and auctions.
Define the deliverable before choosing the buying route
For a store opening, a presence around one specific location may be essential. A national campaign, by contrast, might be able to distribute its playouts across several cities and suitable environments. Both tasks can suit DOOH, but they do not necessarily need the same buying approach.
A good brief therefore separates essential requirements from room for optimisation. Which sites and dates are fixed? Which time windows are interchangeable? What must be delivered? Is the objective to book a particular screen, or a defined volume of audience contacts within an agreed inventory pool? Our guide “Digital out-of-home explained” covers spots, advertising loops and opportunities to see.
Five buying routes, different commitments
The overview below separates a conventional booking from four programmatic options. One source for the terminology is VIOOH's 2023 classification, page 22. This is an older source for definitions, not a statement about current market shares. The current VIOOH product description continues to distinguish guaranteed and non-guaranteed deals. Available options and terminology should be checked with each provider.
| Buying route | Basic principle | What to check |
|---|---|---|
| Direct booking | An order with a media seller, or through an agency; scope and price are agreed. | Record the booked sites, times and delivery obligations explicitly. |
| Programmatic Guaranteed | A price and committed volume agreed in advance, executed programmatically. | A volume commitment does not automatically reserve every individual screen you might want. |
| Preferred / non-guaranteed fixed-price deal | An agreed price and preferred access; volume is not guaranteed. | Do not confuse a fixed price with reserved delivery. |
| Private Auction | Invited buyers bid on available inventory. | Access to the auction does not mean a winning bid or a committed delivery volume. |
| Open Auction | Open auction access through connected buying platforms. | Inventory, bids and availability determine possible delivery. |
A deal ID is not a delivery guarantee
The term Private Marketplace, or PMP, is not used equally narrowly everywhere. The label on a proposal is therefore not enough. Important points include pricing, eligible buyers, priority and any expressly agreed volume and, where applicable, purchasing commitment. A deal ID alone does not answer these questions: it identifies terms within the technology, but does not replace a description of the service being purchased.
Ströer's Programmatic DOOH offering shows that these distinctions have practical relevance. Its page, updated on 16 June 2026, lists Programmatic Guaranteed, Fix Price Deal, Private Auction and Open Auction. It also notes that available deal types depend on the demand-side platform, or buying platform, used. This is a particular provider's offering, not a promise of availability across the whole market.
Open auctions also need clear selection rules
Open access does not mean a campaign should run on arbitrary screens without checks. As an editorial planning recommendation, an inclusion list of suitable sites or environments is worth considering, supported by exclusions and a clear geographical boundary. The key question is which selection controls the particular platform actually provides.
The Broadsign documentation for Place Exchange describes selection parameters for open auctions including site lists, locations, venue categories and formats. It also says that not all connected buying platforms support this buying route. The undated documentation, checked on 21 October 2026, describes one particular system; its capabilities cannot automatically be assumed to apply to other platforms.
Compare prices on the same basis
A lower cost per thousand contacts does not, on its own, make proposals comparable. A meaningful comparison needs the same regions, time windows, spot lengths and audience-contact definitions. It should also establish whether platform, data, agency or production services are included or charged separately. This cost breakdown is a buying recommendation, not a claim about any particular provider's fees.
A clear comparison sheet records media costs, additional costs, total budget and committed delivery separately. For non-guaranteed options, it should include a realistic delivery forecast, explicitly labelled as a forecast rather than a promise. For guaranteed options, clarify what happens in the event of underdelivery, a site outage or late creative approval. The right buying route emerges from this overall assessment, not an isolated price comparison.
Automated buying does not replace creative approval
Programmatic does not mean any creative can appear immediately. The IAB Tech Lab's OpenRTB implementation guidelines, section 7.9, explicitly address prior creative review and possible delays between an auction win and actual on-screen delivery. A winning bid is therefore not proof that an advert has played. The continuously maintained technical guide was checked on 21 October 2026; it is not an effectiveness study.
In practice, a joint pre-launch check should cover file formats, approval deadlines, start time, contacts and fallback creative. Reporting should also make actual playouts and, where used, modelled audience contacts clearly distinguishable. See “Measuring DOOH campaigns” for more detail. A delivery guarantee is not a guarantee of attention, acceptance or sales.
A planning example: a fixed base with flexible additions
A fictional furniture retailer is opening a store and also wants to communicate in several nearby cities. For the immediate opening area, the first question would be which presence can be secured for the important opening weekend. A direct order with appropriate terms or a suitably structured guaranteed deal could serve this purpose.
For additional delivery in other cities, a non-guaranteed buy could be considered if variable delivery volumes are acceptable. The flexible budget should not replace the essential local base. This combination is one possible plan, not a documented campaign success or a general recommendation for any particular provider.
The value of different buying routes lies in using them for the right tasks: commitment where it is needed, flexibility where it supports the objective. Good DOOH planning therefore starts with a precise question about deliverables, and does not end with clicking “Book”.
Sources checked: 21 October 2026. Links lead to technical documentation and provider sources, not independent evidence of effectiveness. No particular buying route is inferred from the Madrid image. This article uses no market forecasts or survey figures.