Content Management Systems have one goal: simplicity. They are designed to simplify the process of updating the content of your website. A CMS is an application that stores all of your content in a password-protected database and publishes it on your website according to your website design and layout. It allows for your administrative users to access an online interface to add, edit, remove, review, search and organize the content in various ways, depending on the specific CMS required.
Do I Need a Content Management System?
Below are several criteria to consider before going forward with a CMS. If you require any of the following, a content management system can save you lots of time and money—and most importantly, it give you full control of your website.

Your website is large with many pages and features

You're just looking for a website that you can maintain yourself

Your website requires frequent updates
Content management systems are ideal for business websites that require frequent updates such as product information, pricing, news articles, photo galleries, video files, audio files, marketing materials.
Most importantly, a content management system can maximize your business efficiency and operations, increases web site traffic and does not require you to be at the mercy of your web designer to complete any changes to your website.