String Writer

Content Management Systems - allows more people to contribute contents and manages web site without having to deal with the technical aspects of web design.

Generally CMS is classified as ECMS & WCMS.

1. Enterprise content management systems - manage the content/documents related to the organization.
2. Web content management systems - manage and publish the content to website or mobile devices.

I’ve not worked much on enterprise content management systems. So I’m listing the details of only WCMS.

Web Content Management System

• Presentation layer displays the content based on templates.
• Provides browser-based interfaces
• Even non-technical users can manage contents

Capabilities

• Automated templates
• Easily editable content
• Workflow management
• Content Targeting
• Document management
• Content syndication
• Multilingual
• Scalable feature sets

Advantages

• Database driven
• Separate design and content.
• Use CSS to control site
  appearance
• Access from anywhere
• Web site management panel
• Schedule content updates
• HTML knowledge not required
• Create automatic RSS Feeds.

Disadvantages

• Storage Volume
• Limited flexibility in design
• Limited SEO of web pages
• Performance Issues
• Maintenance costs

All these details are taken from various web links.