Serial Communication is a method of transmitting data one bit at a time over a single channel or wire. This technique is commonly used in computer systems and devices to send information between components, such as a computer and a printer. It is efficient for long-distance communication and can be implemented using various protocols, including RS-232 and USB. In Serial Communication, data is sent in a sequence, which means that each bit follows the previous one. This contrasts with Parallel Communication, where multiple bits are sent simultaneously over multiple channels. Serial communication is widely used in applications like Arduino projects and embedded systems due to its simplicity and effectiveness.