An overdrive pedal is a type of effects pedal used by guitarists to create a warm, distorted sound. It simulates the natural overdrive that occurs when a tube amplifier is pushed to its limits. By boosting the signal from the guitar, it enhances sustain and adds harmonic richness, making the sound more dynamic and expressive. These pedals are popular in various music genres, including rock, blues, and country. Many musicians use them to achieve a gritty tone without needing to crank their amplifiers. Notable brands include Boss, Ibanez, and Fulltone, each offering unique features and tonal characteristics.