To manage a a modern website a CMS (Content Management System) is essential. Having said that, some CMS's are, in my mind, way too powerful and complicated than what many websites really need.
For smaller websites, particularly if you know a bit of HTML, CMS's like CMSimple_XH are easy to learn, use and deploy. CMSimple_XH powers this website.
How then does a Content Management System work? Is using one really worth it? How do I choose?