Python tkinter toplevel widget

Question

Why we use Toplevel() widget when we can use two widget of Tk().
Also, by the definition of Toplevel "This widget is directly controlled by the window manager. it don't need any parent window to work on " but when I close Tk() widget then Toplevel widget will get automatically closed.

Answer 1

https://riptutorial.com/tkinter/example/22130/difference-between-tk-and-toplevel

Answer 2

Diego should we use Toplevel(root) or only Toplevel() ?