The term "km" stands for kilometer, a unit of measurement in the metric system. One kilometer is equal to 1,000 meters, making it a convenient way to measure longer distances. It is commonly used in many countries around the world for road signs, maps, and travel distances. Kilometers are often used in various fields, including transportation, geography, and science. For example, when driving, distances between cities are frequently expressed in kilometers. This unit helps provide a clear understanding of distance, especially in countries that utilize the metric system, such as Canada and most of Europe.