The project brief states that the site must have a simple content management system(CMS). To get a better understanding of this I researched other content management systems and looked at examples of them.
A content management system (CMS) is a web application (backend) which allows/makes it easier for users to add, edit and manage a website without having to totally recreate it via code. It makes it easier to change the content of a website adding text, images etc without having to enter any code and therefore can be used by non-techical users.
WordPress is a content management system (CMS)