When you have root-level access to a hosting server, this means that you will have full control over it. In other words, you'll be able set up any server-side app no matter what the changes that it will make to the software environment on the server, and you can both access and modify any file, including system files, and change various settings. This can be done by connecting to the server as a root user which has full privileges to perform all these things as well as to create other users, which includes users who also have full privileges. The connection can be established through a web-based graphical interface or a Secure Shell console. For security reasons, it is recommended that you make one more user for your everyday work and employ the root user only when you have to customize the server or to set up software that may be needed by some script-driven application that you would like to run.