Open auction

An open auction is the most accessible form of programmatic buying. Inventory is offered through an exchange or SSP, and multiple buyers compete in real time for each eligible opportunity. In plain terms, it is the opposite of a closed or invitation-only deal. In the Swedish market, the term is most relevant to DOOH rather than classic posted buying: brands use it to access digital screens through DSPs, often alongside direct bookings and PMPs. If you hear “open exchange”, it usually means the same thing.

For a Swedish marketing manager, open auction matters because the market is urban, commuter-heavy and increasingly digital. It suits campaigns that need agility across large commuting flows in Stockholm, regional reach in Gothenburg and Malmö, or tactical bursts around university and growth cities such as Uppsala and Lund. It is also useful when you want Nordic consistency: the same programmatic logic can often be extended into Norway, Denmark and Finland, even though screen footprints, measurement models and availability differ by operator and country.

The mechanics are straightforward: a media owner makes selected digital inventory available through programmatic pipes, a buyer connects via DSP, targeting rules are applied, and bids are evaluated impression by impression or play opportunity by play opportunity. In Sweden, Bauer Media Outdoor states that programmatic buying is available across close to 1,700 screens nationwide and describes the setup as an automated transaction between buying and selling platforms linked to an ad exchange. JCDecaux Sweden also markets a dedicated programmatic DOOH offer, positioning it around precision, flexibility and integration with wider digital media plans. Clear Channel Sweden is highly relevant in the same urban environments, even when many campaigns are still planned in a mix of direct and programmatic routes.

The key difference is access and control. In an open auction, any eligible buyer can bid, so scale and flexibility are high but exclusivity is low. In a Private Marketplace (PMP), inventory is offered only to selected buyers, often with stronger control over context, pricing logic, pacing and preferred inventory access. In Swedish DOOH planning, open auction is often the right tool for testing, always-on optimisation, dayparting and weather-triggered activity, while PMP is better when a brand wants tighter curation, premium screen lists or more predictable delivery in a specific city centre or transport environment.

Use open auction when speed matters, when budgets need to stay flexible, or when you want to complement a booked OOH plan with extra digital coverage. A retailer may add pressure around payday weekends in Malmö and Lund. A national advertiser may expand a Stockholm-heavy launch into Gothenburg and Uppsala only when performance signals are strong. A B2B brand may run narrower office-hours activity in central business districts rather than buying a full-city package. In all these cases, open auction gives the buyer room to optimise by time, location and trigger without rebuilding the whole campaign.

Open auction is efficient, but it is not the same as guaranteed access. Availability can vary by operator, format and moment. Premium panels may be limited during peak periods, and campaign outcomes depend on DSP setup, bid strategy, creative suitability and the quality of location data. Swedish advertisers should also remember that DOOH is measured and traded differently from online display: the goal is usually smart reach and contextual relevance in public space, not one-to-one personal targeting. The best results often come when open auction is treated as part of a broader mix that includes direct DOOH, social, audio and mobile.