Side supply platforms are often referred to as SSP. It is a technological platform that allows web publishers to easily manage advertising space inventory, receive more revenue, and fill it up with ads. Online publishers can sell their online advertising inventory. It makes it easier to manage advertising inventory. Publishers have the ability to get the highest prices for their ads. SSPs have the main goal of helping publishers sell ad impressions on mobile, display, and video platforms. Side supply platforms are very popular among web marketers and make managing ad space easier than ever before.