Freeform Desktop is an app (launcher) that has the look and feel of a true desktop\laptop device and the main purpose is to help you increase your experience and productivity while using your smartphone.
The phones' small screen size and the touchscreen keyboard are usually limitative and inefficient, so to get the most out of this app you should connect your device to an external mouse, keyboard and monitor (or other peripherals like Samsung Dex, Anyware Phonebook or Sentio Superbook).
For full productivity, there's another requirement: you should enable your device's freeform mode. With it turned on, your smartphone becomes a complete desktop with multi-window environment!