What is the overall function of the peripheral nervous system?

PNS serves as the relay between the central nervous system and the body.

Explanation:

The peripheral nervous system is a part or division of the nervous system of the animal which is comprised of all the neurons present outside the central nervous system.

The vital function of the peripheral nervous system is that it joins or connects the central nervous system to the different limbs, organs and the outer skin or the sensory organ of the body.

Thus, PNS serves as the relay between the central nervous system and the body.