CMS helps to separate design of web site from its content. It means designer develops a web site and gives it to its owner or manager who can fill a certain design with different content. If necessary the content of web site, its images and graphics can be easily edited without intervention into design of web site. All changes become visible as soon as you make them. (Don‘t forget to reload page after making changes). Even if you are not an expert of HTML coding, you can easily manage the content of your web site yourself.
CMS is friendly software used for managing the content of web design projects. You can also use CMS for keeping your documents and sharing them with your colleagues. For instance some information of your company is stored by means of CMS. So, each of your colleagues can add, change or update the content of your company‘s web site, its images and audio files. Here and now we see that CMS is acknowledged to be a necessary tool for managing web site content.