Watch movement refers to the mechanism that powers a watch and keeps time. There are two main types: mechanical and quartz. Mechanical movements rely on intricate gears and springs, while quartz movements use a battery and a small crystal to maintain accuracy. The movement is crucial for a watch's functionality, affecting its precision and longevity. Automatic movements, a subset of mechanical, wind themselves through the wearer's wrist motion. In contrast, quartz movements are known for their reliability and require less maintenance, making them popular for everyday wear.