First you have to know the difference , let me explain you , a good conductor is one which conducts heat and electricity with no resistance this is because of the readiness of the substance to allow molecules to move , which in turn it vibrates and transfer heat and electricity
whereas a bad conductor or insulator do not conduct heat or electricity because of the arrangement of tightly packed molecules in it. It does not vibrate or move in order to conduct heat or electricity .
So in order to get good cooking and taste good conductors should be used ,some of the good conductors are Copper , aluminium , brass , silver etc . Hope this helps.
