These are the different IIS Settings you can apply to the directories in your Windows hosting account using the Hosting Control Panel:
This enables an anonymous user to view files in a directory through a Web browser using HTTP. This option is enabled by default and constitutes "normal" browsing. Disabling it requires visitors to enter a password to view your Website.
This enables an anonymous user to view all files in directories without index files by pointing a Web browser to the directory path. "Anonymous Access" must be enabled for "Directory Browsing" to work properly.
Set Application Root
This enables you to set the directory or subdirectory as an IIS application root within your Website. All directories and files contained within the application root are considered part of the application.
Click this to reset the permissions for this directory to their default values. This action will remove the directory from the list of custom-permission directories (but the directory on the file system will not be deleted).