Having full root-level access means that you can access and change any kind of file on a particular server, in addition to all the system files, and to change system settings or install server-side software which may be required by specific scripts and even offline applications to function properly. A server is accessed at the root level with a root user, which has full privileges to perform all of the abovementioned things. The root user may also make other users. For security reasons, you are advised to have one more account for routine 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 feature will provide you with full control over your server from any location, given that you know the user credentials.