Steam output is a parameter that indicates the overall ability of the iron to generate steam during ironing. Steam output is usually expressed in grams per minute and depends on various factors such as the size of the water tank, the temperature of the ironing surface and the steam pressure. A higher steam output means that the iron can remove creases and wrinkles from fabrics faster and more efficiently. When choosing an iron, it's important to consider the steam output depending on your needs and the types of fabrics you regularly iron.