A futon is a versatile piece of furniture that can serve as both a bed and a sofa. Traditionally, it consists of a mattress and a frame that can be folded or converted, making it ideal for small spaces. Futons originated in Japan, where they are often used as a bedding option on the floor. In modern settings, futons are popular in college dorms and studio apartments due to their space-saving design. They come in various styles, materials, and sizes, allowing users to choose one that fits their decor and comfort needs.