A washer-dryer combo is a single appliance that combines both washing and drying functions. It allows users to wash and dry clothes in one machine, saving space and time. This type of appliance is especially popular in small apartments or homes where laundry space is limited. These machines typically use a front-loading design and can handle various load sizes. After washing, the machine automatically switches to the drying cycle, eliminating the need to transfer clothes between two separate machines. Many models also offer energy-efficient options, making them a practical choice for eco-conscious consumers.