A Microwave oven is a type of kitchen appliance that uses microwaves to heat food. They work by emitting microwaves, which cause the water molecules in food to vibrate and create heat. This allows food to be cooked quickly and evenly, making it a convenient and popular choice for many households. Microwave ovens come in a range of sizes, styles, and features, including convection, grill and combination microwave ovens. Some models can also be used for baking and roasting. They can be used to heat, cook and defrost a wide variety of food items.