Having full root-level access signifies that you will be able to access and update each 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 needed by specific scripts and even offline apps in order to function effectively. A server is accessed at the root level with a root user, who has full privileges to do all of the abovementioned things. Your root user may also generate various other users. For security 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 specific task on your hosting server. The root-level access attribute gives you full control over your server from any kind of location, provided that you have the user credentials.