A demand-side platform (DSP) is a technology that allows advertisers to purchase digital advertising space in an automated way. It helps advertisers manage multiple ad exchanges and data sources from a single interface, making it easier to target specific audiences and optimize ad campaigns in real-time. DSPs use algorithms and data analytics to analyze user behavior and preferences, ensuring that ads reach the right people at the right time. This technology is essential in the world of online advertising, where efficiency and precision are crucial for maximizing return on investment (ROI) for advertisers.