Content Managed Websites allow you to keep your site up-to-date by yourself.
Using a web-based back-end, you can add, edit and remove any content you wish using a simple user interface. If you’re familiar with any word processing software, you’ll pick it up quickly, plus I supply documentation just in case. I can also offer training if required.
If you want to sell online, then an E-commerce Solution may be more suitable than a standard CMS website.