---
title: What is a DSP in DOOH advertising?
description: "Demand-side platform: software that buyers use to purchase ad space across many sellers. Learn what DSP means in DOOH advertising."
type: glossary
term: DSP
shortDefinition: "Demand-side platform: software that buyers use to purchase ad space across many sellers."
category: buying
alsoCalled:
  - Demand-side platform
seeAlso:
  - SSP
  - Programmatic
---

A DSP works for the buyer. In programmatic DOOH, a DSP buys screen time from media owners through a supply-side platform.