Content is the core of the CMS. Content is information - therefore - everything is content!
Content in a CMS may be reused (permissions permitting) across multiple pages, which ensures that the most up-to-date information is always presented.
In the CMS, content is separate from the page layout. Page layout is determined through the use of templates. A template is a formatted design which defines the look and feel of a page. It may be reused many times. Content is added to templates through the use of components. A component is a specialized content container. The component gets added to your page template and will display content in a particular way or for a particular purpose. For example, a text component will present text only. Adding in an image component defines a section of the page to display an image only.