What is a cms website designer? CMS stands for Content Management System, and cms website designer can either refer to a person who creates cms websites or the program used to create cms websites. A cms website designer allows you to easily and efficiently manage a website and all of the associated text, images, and other files without having the technical knowledge of web programming. That being said, as a person who does possess the technical skills of a web developer, I wouldn’t even consider foregoing the great benefits of a cms website designer for the nostalgic joys of manually managing a website and its content. A cms website designer (when properly configured) essentially provides a framework for a website, providing templates and tools to quickly and simply create new pages, or modify existing ones, while preserving the design aesthetic of the site.