A demand-side platform, or DSP, is a type of technology platform that is used by advertisers and other buyers of digital advertising inventory. DSPs enable advertisers to manage and automate their manual and programmatic buying of media inventory from various sources, including ad exchanges, ad networks, and publishers.

DSPs typically provide advertisers with a range of tools and features to help them manage their media planning. This can include things like real-time bidding, targeting and segmentation, campaign management, reporting and analytics, and more.