A headless CMS is a type of backend-only content management system. Unlike a traditional CMS architecture, a headless CMS’s content repository, or “body,” is separated from any presentation layer/delivery layer, or “head.” This is similar to a headless site architecture, where a brand’s frontend system is decoupled from its backend system. To display content in a headless content management system, content APIs deliver the content, where it can be displayed across digital channels and devices.