Programmatic DOOH

Programmatic digital out-of-home moves the sale of screen time onto the same machinery that sells online advertising. A media owner lists inventory on a supply-side platform, a buyer bids for it through a demand-side platform, and an impression is priced and filled in the time it takes to load the next slot.

The vocabulary is borrowed wholesale from online advertising, which is the point and also the confusion. An impression on a screen is not one person looking at a browser; it is an estimate of how many people passed a place during a play. Every platform in the category calculates that differently, and comparing two CPMs without knowing how each side counted is comparing nothing.

The distinction that matters most to a screen owner is not open exchange versus private marketplace but what programmatic does to an existing direct sales relationship. A network that sells its best sites twice, once to a sales team and once to an auction, has a problem that floor pricing and competitive separation exist to solve. Which is why every supply-side platform leads with control rather than with revenue.