Winding is actually tightening the mainspring to store a supply of energy that might power a mechanical watch. A manual winding is performed by turning the crown, while an automatic watch winds itself using a rotor that moves with the motion of the wearer. Regular winding is necessary for the proper maintenance and function of mechanical watches. Manual ones usually demand to be hand-wound daily, so it becomes a sense of ritual that connects the wearer with the craftsmanship of the watch.
An automatic watch stays wound as long as it is worn regularly. Preventing overwinding through its structure, this ensures that it keeps it going without fail. This process reflects the mechanical beauty as well as the timelessness of horological craftsmanship.