An arpeggio is a common technique in playing stringed instruments and keyboards. The pianist’s fingers danced in an arpeggio across the keys.
Pro Tip 2/3
Not a Scale
Don't confuse arpeggios with scales; arpeggios are based on chords, not a sequence of pitches. She practiced scales and arpeggios separately.
Pro Tip 3/3
Emotion Expression
Composers use arpeggios to convey emotions; they can sound gentle or dramatic based on the context. The arpeggio conveyed a sense of longing in the song.