Having full root-level access signifies that you will be able to access and modify each file on a selected server, including all the system files, and to change system settings or install server-side software which may be necessary for certain scripts and even offline apps in order to function properly. A server is accessed at the root level with a root user, which has full privileges to do all the abovementioned things. The root user can also make other users. For safety reasons, you are advised to have a separate account for daily tasks and to use the root account only if you actually need to do a particular task on the server. The root-level access feature will provide you with full control of your server from almost any location, provided that you know the user credentials.