Amplitude Modulation (AM) is a technique used in electronic communication, most commonly in radio broadcasting. It works by varying the strength, or amplitude, of a carrier wave to encode information, such as sound. When a voice or music signal is combined with the carrier wave, the amplitude changes according to the audio signal, allowing the sound to be transmitted over long distances. In AM radio, the receiver picks up the modulated signal and demodulates it to retrieve the original audio. This method is simple and effective, making it a popular choice for stations like AM radio channels. However, AM signals can be more susceptible to noise and interference compared to other modulation methods, such as Frequency Modulation (FM).