What are conductor?

Answer 1

Conductors are materials whose atoms have valence electrons operating in energy levels that permit them (the electrons) to be moved easily. Remember that current flow is like musical chairs. Put an electron in one end of a wire and electrons within the wire shift "over" a spot and an electron leaves the other end. If a wire is made of, say, copper (which is selected primarily for its ability to conduct electricity), valence electrons about the copper atoms in the wire occupy energy bands that permit them to be easily moved and the wire will support current flow.

Answer 2

Conductors are things that transmit energy.

The two main types of conductors are those that conduct heat, and those that conduct electricity.

Metal is a very good thermal conductor and also a very good electrical conductor. Rubber is the opposite.