Supply-Side Platform (SSP)
01 Definition
Supply-Side Platform (SSP) meaning: Software publishers use to sell and manage their ad inventory programmatically.
A supply-side platform is software that helps publishers offer and sell their ad inventory to many buyers automatically. It connects a publisher's sites and apps to ad exchanges and demand-side platforms, and manages auctions to fill each impression at the best available price. The SSP sits on the seller's side, the mirror image of a DSP.
Why it matters
How Supply-Side Platform (SSP) fits the work
An SSP lets publishers open their inventory to many bidders at once and automate pricing, helping them fill space and raise the value of each impression.
In context
A news publisher uses an SSP to auction its display inventory, letting many buyers bid through connected exchanges to fill each impression.
Practical note
Multiple SSPs on one page can create duplicate or conflicting bids and add latency; publishers must manage floors and partners carefully to protect both revenue and page speed.