Benifits of having a website that you can update

Keep your content fresh
The most tiresome thing about a web site is when your customers see your content is years old.

Save money
No need to call in expensive web designers to make general content changes.

Speed to market
When you have a CMS, you suddenly have a tremendous advantage in the time it takes to react to market intelligence. You can write, edit and publish updates in a matter of minutes

Extended "shelf life"
Sites can evolve over time, thereby extending their "shelf life" well beyond the typical two to three years of static sites.

Search/Indexing:
Control all Metadata and search tags yourself, add more content and more pages to make your site attractive to search engines.

What is a content management system (CMS)?
Simply put a content management system will allow you to edit the content of your website, through a user-friendly web based interface i.e. a web browser.

Why do you need a content management system?
The fundamental reason is simply to keep your website content up to date. By minimising the update costs you will be more inclined to keep your site up to date and gain all the benifits of having "Fresh Content".