A major chord is a triad, which consists of three notes: the root, the major third, and the perfect fifth.
The formula 1-3-5 represents the intervallic structure of a major chord:
For example, in a C major chord:
The combination of these three notes (C, E, G) creates the sound of a C major chord.
Major chords have a consonant and uplifting quality, often associated with feelings of happiness or positivity. They are commonly used in various genres of music and form the foundation for many songs.
On a piano or keyboard, major chords are typically played by pressing the root note, the major third, and the perfect fifth.
In guitar playing, major chords are formed by pressing down specific combinations of strings and frets, following chord diagrams or finger positions.