The significance of frequency modulation (FM) in telecommunications lies in its ability to encode information in a carrier wave's frequency changes. FM is widely used in radio broadcasting, as it provides better sound quality and resistance to interference compared to amplitude modulation (AM). By transmitting signals at various frequencies, FM enhances clarity and fidelity, making it ideal for music and voice transmissions. Its applications extend to two-way communication systems and data transmission, supporting more reliable and robust communication channels.