What is the difference between a device driver and 'plug and play'?

Alright, listen up buttercup. A device driver is like the chauffeur for your hardware, telling the operating system how to communicate with it. 'Plug and play' is like the lazy friend who shows up uninvited to the party and just works without needing a driver installed. So basically, one requires a driver to function, while the other is ready to go straight out of the box.