WCMS (Web Content Management System) software systems are used to manage and/or control a large collection of website materials such as HTML documents, user details, images and many other website files. Some more key features are:

Template automation
A standard template output can be created usually in (X)HTML or XML that can automatically be applied to a new or existing page, which allows the content to be edited from one place.

Easy content editing
Most CMS's come with an editing tool called WYSIWYG which allows non-technical users to creat and edit most if not all your websites content from within the content manager.

Scalable feature sets
Content Management systems ofter include modules and/or plugins that can be installed or uninstalled to add to your websites functions.

Upgrades
Most CMS systems will have regular updates to new features and to keep uptodate with the latest web standards.

Workflow management
Workflow is a sequence of parall tasks that must be compleated in the CMS. For example, lets say a story is submited by a content creator, it can not be publish until the copy editor or editor chief etc approves it.

Document management
Managing your documents is an importaint part of content management and most CMS software will provide the means for you to manage documents from creation, through revision, publication, archive and even destruction.

Content virtualization
Content management systems oftern allow each user to work within virtual copys of the website, document and/or code. This allows multiple resources to be interdependently viewed, edited and executed before submission.