Having full root-level access means that you can access and update every file on a specific 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 in order to function properly. A server is accessed at the root level through a root user, which has full privileges to perform all the abovementioned tasks. Your root user can also create other users. For security reasons, you are advised to have a different account for everyday tasks and to use the root account only if you actually need to do some task on the website hosting server. The root-level access function will give you full control of your server from any existing location, as long as you have the user credentials.