Serial transmission is a method of sending data one bit at a time over a single channel or wire. This approach is commonly used in communication systems, such as USB and RS-232 interfaces, where data is transmitted sequentially, making it simpler and more cost-effective than parallel transmission, which sends multiple bits simultaneously. In serial transmission, the data is often organized into packets, which include not only the actual data but also control information like start and stop bits. This ensures that the receiving device can accurately interpret the incoming data stream, making serial transmission reliable for various applications, including computer networking and telecommunications.