CMS or Content Management System itself highlights what it does mean. It focuses on having a command over content/s by the admin or user.
Content always needs up gradation on a website that makes it conducive for that website. The elevation of content comprises addition, deletion or modification of the manuscription quite easily. The system should be universal, i.e. operational from anywhere and anytime. An admin can put the required content at desired place or remove the same for implementation of a new one. The system should be so desirable that it needs no training or expertise for getting the work done.
Used as a simplest tool to execute content using simple, profitable, browser-based mechanisms, CMS allows even a novice to make changes in layout, design, content, presentation, etc.