Having full root-level access means that you will be able to access and update every file on a selected server, including all system files, and to change system settings or set up server-side software which may be needed by certain scripts and even offline applications to work appropriately. A server is accessed at the root level through a root user, who has full privileges to perform all of the aforementioned things. The root user may also generate other users. For safety reasons, you're advised to have another account for daily tasks and to use the root account only if you actually need to perform a task on your website hosting server. The root-level access function offers you full control of your server from almost any location, as long as you know the user credentials.