Marketing teams turn to specialist software to manage a tremendous variety of content for production, approval, and publication; Forrester calls these specialist offerings content marketing platforms (CMPs). These technologies do not substitute for but rather complement existing digital experience technologies, such as web content management (WCM) and social media management tools. This report describes CMPs, the use cases they serve, their prospects, and how and when marketers should select one. This is an update of a previously published report; Forrester reviews and updates it periodically for continued relevance and accuracy.