Square footage is a measurement that tells you how much space is in a room or building. It is calculated by multiplying the length and width of a space. For example, if a room is 10 feet long and 12 feet wide, its square footage would be 120 square feet. This measurement helps people understand the size of a space when buying or renting a home. Knowing the square footage is important for various reasons, such as determining how much furniture can fit in a room or how much flooring is needed. Real estate agents often use square footage to compare different properties, helping buyers find the right home for their needs.