Final answer:
A VBox is a layout container that arranges its nodes vertically from top to bottom, aiding in the creation of structured and hierarchical GUIs.
Step-by-step explanation:
Layout containers are essential in graphical user interface (GUI) design for organising components in a structured manner. In this context, a VBox is a specific type of layout container.
When using a VBox the nodes within it are arranged vertically from top to bottom. This functionality is important for creating visually coherent and hierarchical interfaces where elements are stacked one after another along the vertical axis.