A steam iron is a household appliance designed to remove wrinkles and creases from clothing and fabrics using heat and steam. It typically consists of a flat metal plate (soleplate) that heats up to smooth out wrinkles when pressed against fabric. Steam is generated from water stored in a built-in tank or reservoir, which is expelled through small holes in the soleplate to help relax and smooth fabrics more effectively. Steam irons come in various designs and features, such as adjustable temperature settings, steam output controls, and safety features like auto shut-off. They are essential for maintaining a neat and professional appearance for clothes, linens, and other textiles.