The term "3nm" refers to a semiconductor manufacturing process that produces transistors with a size of 3 nanometers. This small size allows for more transistors to fit on a chip, enhancing performance and energy efficiency. It is a significant advancement in technology, as smaller transistors can switch faster and consume less power, which is crucial for modern devices. The 3nm process is primarily used in the production of microchips for devices like smartphones, computers, and other electronics. Companies such as Intel and TSMC are leading the way in developing this technology, which is expected to drive innovations in various fields, including artificial intelligence and high-performance computing.