Think of a website as a sandwich. The content (text, images, videos) is the fillings, but you need bread to hold it all together. A CMS, or Content Management System, is like the bread. It provides the basic structure and tools to create, edit, and manage your website content without needing to code.
So, you can focus on the yummy fillings (your content) while the CMS takes care of the technical stuff, making it easy to build and maintain your website.