xfce:getting-started [Xfce Docs]
https://docs.xfce.org/xfce/getting-startedUse startxfce4 to start an Xfce session or choose Xfce Session from the login manager, which includes the session manager, the panel, the window manager and the desktop manager. See auto login from console for more information. By default, the Xfce session manager manages the startup of applications.
xfce:xfdesktop:start [Xfce Docs]
https://docs.xfce.org/xfce/xfdesktopxfdesktop - Xfce Desktop Manager. Xfdesktop is a desktop manager for the Xfce Desktop Environment. It handles the following tasks: It can bring up an applications menu and a list of all running applications when you click on the desktop with the right or middle mouse button respectively. Settings are available via the Settings Manager .