Key takeaways
- Programmatic DOOH means buying screen time through automated systems instead of phone calls and insertion orders.
- It spans real-time open auctions, private marketplaces (PMPs) with invited buyers, and programmatic guaranteed deals at fixed prices.
- The plumbing: advertisers buy through a DSP, screen owners sell through an SSP, and exchanges connect the two.
- Auction-based buying suits agencies at scale; fixed-price self-serve buying delivers the same automation with predictable costs for smaller buyers.
What "programmatic" actually means
Programmatic just means bought and sold by software. Instead of emailing a sales house, negotiating a rate and signing an insertion order, an advertiser's system talks to a screen owner's system and the transaction happens automatically — sometimes in the milliseconds before a loop slot plays. Everything else — auctions, bids, deal types — is detail on top of that one idea.
The cast: DSPs, SSPs and exchanges
- DSP (demand-side platform) — the buying tool. Advertisers and agencies use it to set budgets, targeting and bids across many screen networks at once.
- SSP (supply-side platform) — the selling tool. Screen owners use it to offer their inventory to buyers and manage pricing and rules.
- Exchange — the marketplace in the middle where offers meet bids and a play gets transacted.
The three ways programmatic deals happen
- Open auction (RTB) — inventory offered to all bidders in real time; highest qualifying bid plays. Maximum reach and efficiency, least predictability: prices float and you don't always know exactly which screens you'll win.
- Private marketplace (PMP) — an invitation-only auction on curated, usually premium inventory. More control and quality guarantees, negotiated access.
- Programmatic guaranteed — automated pipes, fixed price, reserved inventory. The certainty of a direct booking with the convenience of software.
The honest trade-offs
Programmatic's strengths are real: scale across thousands of screens, data-driven targeting, and buying that reacts in real time. Its frictions are real too — DSPs are built for media professionals with tech fees and learning curves to match; auction pricing makes budgeting fuzzy; and delivery reporting is usually proof of play, not proof of display — a log from the player, not independent confirmation the ad was on the glass.
Where Admitt sits
Admitt takes a deliberate position in this landscape: a self-serve exchange with fixed pay-per-display prices rather than real-time auctions. You get the automation programmatic promised — browse the live screen map, book in minutes, no insertion orders — with the price certainty of programmatic guaranteed: every screen shows its rate before you commit, from £8/day. And billing is gated on independent verification of every play, which most programmatic pipelines can't offer.
A simple way to choose
Running national campaigns across thousands of screens with an agency and a DSP seat? Auction-based programmatic earns its complexity. Buying screens you can name, in places your customers actually stand, on a budget you need to predict? Fixed-price self-serve gives you the same automation without the auction — and you'll know exactly what ran.
For screen owners
The same distinction applies in reverse: opening inventory to programmatic demand means more potential buyers but auction-dependent yields; listing on a fixed-price exchange means you set your own rates and know what each play earns. Networks increasingly do both — and verified inventory commands more trust with buyers on either route.