Orthogonal Frequency Division Multiplexing (OFDM) is a digital communication technique that divides a single data stream into multiple smaller streams. Each stream is transmitted simultaneously over different frequencies, which are closely spaced but do not interfere with each other. This method improves data transmission efficiency and reduces the impact of interference and signal fading. OFDM is widely used in various technologies, including Wi-Fi, 4G, and 5G networks. By utilizing multiple carriers, it allows for higher data rates and better performance in environments with obstacles or varying signal conditions. This makes it a popular choice for modern wireless communication systems.