A demand-side platform (DSP) is a technology platform where mobile advertisers can automate to buy ad spaces in order to promote their mobile apps. Advertisers can buy and manage those ad spaces from multiple publishers via demand-side platforms. 

As distinct from mobile ad networks, DSPs allow mobile advertisers to track, manage, and optimize ad campaigns in real time with a single dashboard. This helps advertisers to avoid wasting their time on trying to handle a lot of publishers and their specifications.