Having full root-level access signifies that you will be able to access and update any file on a specific server, which includes all system files, and to change system settings or install server-side software that may be needed by certain scripts and even offline apps in order to work efficiently. A server is accessed at the root level through a root user, which has full privileges to perform any of the abovementioned tasks. Your root user may also make various other users. For security reasons, you are advised to have another account for day-to-day tasks and to use the root account only if you actually need to do a particular task on the hosting server. The root-level access attribute provides you with full control over your server from any location, as long as you have the user credentials.