Metrology is the science of measurement, encompassing all theoretical and practical aspects that involve measurement. It includes the development of measurement standards, techniques, and procedures to ensure the accuracy and consistency of measurements. Metrology plays a crucial role in various fields, including manufacturing, engineering, and science, as it is essential for ensuring the quality and reliability of products, processes, and research results. Key areas of focus in metrology include calibration, traceability, uncertainty analysis, and measurement validation. Overall, metrology is fundamental for facilitating international trade, technological innovation, and scientific advancement.