Having full root-level access signifies that you can access and modify every file on a particular server, including all the system files, and to change system settings or set up server-side software that may be required by certain scripts and even offline applications to work efficiently. A server is accessed at the root level with a root user, which has full privileges to perform any of the abovementioned tasks. Your root user can also make other users. For safety reasons, you're advised to have a different account for routine tasks and to use the root account only if you actually need to do a particular task on the website hosting server. The root-level access attribute gives you full control over your server from any location, provided that you know the user credentials.