A sofa is a piece of furniture designed for seating two or more people comfortably. Typically, it features a backrest and armrests, and sometimes cushions for added comfort. Sofas come in various styles, sizes, and materials, ranging from traditional to modern designs. They are commonly found in living rooms, family rooms, and sometimes in other areas of the house like dens or home offices. Sofas can be a focal point of a room's decor and are often used for lounging, socializing, or watching television.