This question is a rather difficult one to answer. Because different companies have different interpretations of it when making their devices. But in theory, hubs are meant to expand the capabilities of your port (display, audio, and USB), whereas docks add other types of connections to your USB port in particular. On the other hand, docking stations typically focus on expanding your USB port’s connectivity options by adding various other types of connections, including HDMI, Ethernet, and more. Additionally, docking stations generally provide a power input port to charge your device while expanding its functionality.