Why is the probe method needed in Linux device drivers in addition to init?

Question

In the linux kernel, what does the probe() method, that the driver provides, do? How different is it from the driver\'s init function, i.e. why can

Answer 1

Init(void) // runs once when the driver/module is invoked and sets things up for the kernel driver machine.

Probe(*pdev) // is used by the kernel driver machine as needed to detect and install actual devices