A major triad is a three-note chord that consists of a root note, a major third, and a perfect fifth. For example, in the C major triad, the notes are C (root), E (major third), and G (perfect fifth). Major triads create a bright and happy sound, making them a fundamental building block in music. These triads can be played in various inversions, meaning the order of the notes can change. The first inversion has the major third as the lowest note, while the second inversion has the perfect fifth as the lowest note. Understanding major triads is essential for musicians and composers.