Having full root-level access means that you will be able to access and update any file on a specific server, in addition to all of the system files, and to change system settings or set up server-side software that may be required by certain scripts and even offline applications to function appropriately. A server is accessed at the root level with a root user, who has full privileges to do any of the abovementioned tasks. Your root user can also create various other users. For security reasons, you're advised to have a separate account for routine tasks and to use the root account only if you actually need to perform a particular task on the server. The root-level access feature will provide you with full control of your server from any kind of location, as long as you know the user credentials.