The International System of Units, commonly known as SI, is a standardized system used worldwide for measuring physical quantities. It was established to provide a consistent framework for scientists, engineers, and industries to communicate measurements clearly. The SI includes seven base units, such as the meter for length and the kilogram for mass, from which other units can be derived. SI is essential for global trade, scientific research, and technological development. By using a common measurement system, it helps avoid confusion and errors that can arise from different local units. This uniformity supports collaboration across borders and disciplines, enhancing the accuracy and reliability of measurements.