The E chord is a fundamental guitar chord that is commonly used in various music genres. It consists of the notes E, G#, and B, which form a major triad. To play the E chord on the guitar, you typically place your fingers on the first fret of the G string, second fret of the A string, and second fret of the D string, while strumming all six strings. This chord is often one of the first chords beginners learn due to its simple finger positioning and open string resonance. The E chord serves as a foundation for many songs and is frequently used in chord progressions, making it essential for aspiring guitarists.