A major interval in music refers to the distance between two notes that creates a specific sound quality. It is characterized by a bright and happy sound, often used in melodies and harmonies. For example, the interval between the first note of a C major scale and the third note, E, is a major third. In Western music, major intervals are essential for constructing chords and scales. The most common major intervals include the major second, major third, and major sixth. Understanding these intervals helps musicians create pleasing melodies and harmonies in various genres, from classical to pop music.