Having full root-level access means that you will be able to access and change each file on a specific server, in addition to all the system files, and to change system settings or install server-side software that may be needed by specific scripts and even offline apps to function properly. A server is accessed at the root level with a root user, who has full privileges to do all the abovementioned things. Your root user may also generate other users. For safety reasons, you are advised to have one more account for day-to-day tasks and to use the root account only if you actually need to perform a task on your server. The root-level access feature will provide you with full control of your server from almost any location, given that you have the user credentials.