Having full root-level access means that you'll be able to access and change any file on a selected server, in addition to all system files, and to change system settings or install server-side software which may be needed by specific scripts and even offline applications to work appropriately. A server is accessed at the root level with a root user, which has full privileges to do all of the aforementioned tasks. The root user may also create various other users. For security reasons, you're advised to have a different account for daily tasks and to use the root account only if you actually need to perform a particular task on your server. The root-level access feature provides you with full control of your server from any location, as long as you know the user credentials.