AM/FM radio refers to two types of radio broadcasting: Amplitude Modulation (AM) and Frequency Modulation (FM). AM radio transmits sound by varying the amplitude of the radio waves, making it suitable for long-distance communication. It is often used for talk shows, news, and sports broadcasts. FM radio, on the other hand, varies the frequency of the waves, which allows for better sound quality and less interference. This makes FM ideal for music broadcasts. Both AM and FM radio can be accessed through various devices, including car radios, portable radios, and smartphones.