A supply-side platform or sell-side platform (SSP) is a technology platform to enable web publishers to manage their advertising space inventory, fill it with ads, and receive revenue. Many of the larger web publishers of the world use a supply-side platform to automate and optimize the selling of their online media space.
This system allows advertisers to put online advertising before a selected target audience. SSPs are sending impressions into ad exchanges, where DSPs purchase them on marketers' behalf, depending on specific targeting attributes. By offering impressions to as many potential buyers as possible publishers can maximize the revenue. Therefore, SSPs are sometimes referred to as yield-optimization platforms. Often, real-time bidding (RTB) is used to complete DSP transactions.
Unlike advertising networks that target buyers (advertisers), supply-side platforms provide services for publishers (website and app owners). Supply-side platforms are often integrated into the structure of advertising and ad serving companies, as well as ad exchanges that work with both publishers (supply side) and advertisers (demand side):
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