is a kind of portable grate raised on a tripod, originally heated with charcoal in a brazier, and used for foods that require gentle cooking, away from the “fierce” heat of direct flames.
The chafing dish could be used at table or provided with a cover for keeping food warm on a buffet.
The warmer for the chafing can use electricity, candles or gas. You do not use the chafing to cook food, only to keep it warm once it has been prepared on a stove or in the oven. Nevertheless, you can bake food using the inner metal tray of the dish.