Square footage is a measurement of area that indicates the size of a space, typically used in real estate and construction. It is calculated by multiplying the length and width of a room or building, with the result expressed in square feet. For example, a room that is 10 feet long and 12 feet wide has a square footage of 120 square feet. Understanding square footage is important for various purposes, such as determining how much flooring or paint is needed, or assessing the value of a property. It helps buyers and sellers compare different spaces, ensuring they make informed decisions regarding their investments in real estate.