Power chords, a staple in rock and metal genres, consist of two or three notes played on the guitar. They are constructed using a root note and either its fifth or octave. Unlike traditional major or minor chords, power chords lack a distinct tonality, creating a neutral sound that lends itself well to heavy distortion and palm muting techniques. Their simplicity and versatility make them ideal for creating a solid foundation and driving rhythm in songs. Power chords are often played on the lower strings of the guitar, delivering a raw and powerful sound that has become synonymous with the energy of rock music.