Having full root-level access signifies that you will be able to access and update any file on a specific server, which includes all the 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 function appropriately. A server is accessed at the root level via a root user, which has full privileges to do all of the aforementioned things. Your root user may also generate various 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 perform a task on your website hosting server. The root-level access function provides you with full control over your server from any existing location, provided that you have the user credentials.