Having full root-level access signifies that you can access and modify every file on a particular server, which includes all the system files, and to change system settings or set up server-side software which may be needed by specific scripts and even offline apps in order to function properly. A server is accessed at the root level via a root user, who has full privileges to perform any of the aforementioned tasks. Your root user can also make other users. For security reasons, you are advised to have another account for everyday tasks and to use the root account only if you actually need to do a task on your server. The root-level access feature will give you full control over your server from any location, provided that you have the user credentials.