A Major Seventh Chord is a type of chord that consists of four notes: the root, major third, perfect fifth, and major seventh. For example, in a C Major Seventh Chord, the notes are C, E, G, and B. This chord has a bright and rich sound, often used in various music genres, including jazz and pop. The major seventh interval creates a unique tension that adds depth to the harmony. Musicians often use Major Seventh Chords to evoke feelings of warmth and sophistication, making them a popular choice for composers and songwriters looking to enhance their music's emotional impact.