Multi-level FSK, or Frequency Shift Keying, is a digital modulation technique that encodes data by varying the frequency of a carrier wave. Unlike traditional binary FSK, which uses two frequencies to represent binary digits (0s and 1s), multi-level FSK employs multiple frequencies to represent more than two symbols. This allows for the transmission of more bits per symbol, increasing the data rate. In multi-level FSK, each frequency corresponds to a unique symbol, enabling efficient use of bandwidth. This technique is particularly useful in applications like wireless communication and data transmission, where maximizing data throughput is essential while maintaining signal integrity.