SSP(Supply-Side Platform) is a kind of publisher solutions as a centralized platform to sell/manage inventory, access many advertisers, DSPs, etc.

• SSP provides an environment for RTB(Real-Time Bidding).
• SSP exchanges information with DSP, Ad Exchanges

To be updated later...

You may want to know more about real-time bidding system composed of DSP, SSP, DMP, ATD and ITD.  Please refer following associated information for more information: