SSP (Supply-Side Platform)

An SSP (Supply-Side Platform) is an advertising technology platform used by publishers to manage, organize, and sell their ad inventory to advertisers and ad networks. The SSP connects the publisher's inventory to demand sources, manages floor prices and deal terms, runs the auction logic, and sends reporting back to the publisher. In newsletter advertising, an SSP allows publishers to define their ad placements, set pricing floors, apply brand safety rules, manage direct-sold deals, and access programmatic demand — all in one interface. MailAdx includes a full-featured newsletter SSP in the Publisher Portal, designed specifically for email publishers rather than web/display operations.