A Demand Side Platform, commonly referred to as a DSP, is a type of software that allows advertisers to buy advertising space in an automated fashion. It is a technology platform that provides centralized and aggregated media buying from multiple sources including ad exchanges, ad networks, and sell-side platforms, all through a single interface. DSPs enable advertisers and agencies to optimize their digital advertising efforts by using real-time bidding (RTB) to purchase ad impressions based on specific targeting criteria such as demographics, behavior, geography, and the context of the webpages. These platforms are equipped with sophisticated algorithms that analyze the value of an ad impression and determine the optimal bid price. As a result, advertisers can manage their campaigns across a wide range of publishers, streamline the ad buying process, and make data-driven decisions to maximize the return on investment of their advertising budgets. DSPs have become an essential tool in the programmatic advertising ecosystem, providing efficiency and scalability to digital ad buying and helping advertisers to reach their target audience more effectively.