Mandolin chords are combinations of notes played together on a mandolin, a stringed instrument similar to a guitar but with a higher pitch. Each chord is formed by pressing down specific strings on the instrument's neck, creating harmonious sounds. Common chords include major, minor, and seventh chords, which are essential for playing various styles of music. Learning mandolin chords is crucial for beginners, as they provide the foundation for playing songs. Chords are often represented in chord charts, showing finger placements. Mastering these chords allows players to accompany themselves or others, enhancing their musical experience.