Having full root-level access means that you'll be able to access and update any kind of file on a specific server, including all the system files, and to change system settings or install server-side software that may be required by certain scripts and even offline apps to function effectively. A server is accessed at the root level through a root user, which has full privileges to perform all of the aforementioned things. The root user can also generate various other users. For safety reasons, you are advised to have another account for daily tasks and to use the root account only if you actually need to perform a specific task on the website hosting server. The root-level access feature offers you full control over your server from almost any location, given that you know the user credentials.