Units of measurement are standard quantities used to express and compare different physical properties. They help us understand and communicate sizes, weights, distances, and volumes. For example, we use meters to measure length, kilograms for weight, and liters for volume. These units provide a common language that allows people to share information accurately. Different fields use specific units tailored to their needs. In science, the metric system is widely used, which includes units like grams and degrees Celsius. In everyday life, we might use inches or pounds. Understanding these units helps us make sense of the world around us.