Having full root-level access signifies that you can access and modify any kind of file on a selected server, in addition to all the system files, and to change system settings or install server-side software that may be required by certain scripts and even offline applications in order to work appropriately. A server is accessed at the root level through a root user, which has full privileges to perform all the aforementioned tasks. Your root user can also create other users. For security reasons, you're advised to have one more account for daily tasks and to use the root account only if you actually need to do a specific task on your server. The root-level access feature offers you full control over your server from almost any location, as long as you have the user credentials.