If you have a website it may well have a content management (CMS) system installed on the back end. This is a system that allows a user to log in and make certain changes to the site such as add or remove products and add / change content. Depending on which content management system your web developer uses and the level of access you have will decide what you can change within the site.

Some web development companies will have their own content management system that they have created. The advantage of a bespoke content management system such as one like this is that the web development company will have complete control over what functionality they can add in for you and how you want the back end of the website (CMS area) to work.

Off the shelf CMS systems can be cheaper but do often have limitations meaning that you can only change what they allow you too.