Gallons Per Minute (GPM) is a measurement used to indicate the flow rate of liquids, specifically how many gallons pass through a point in one minute. This unit is commonly used in various applications, such as plumbing, irrigation, and water supply systems, to assess the efficiency and capacity of pumps and pipes. Understanding GPM is essential for ensuring that systems meet the required water flow for specific tasks. For example, a showerhead may have a GPM rating to help consumers choose fixtures that conserve water while providing adequate pressure.