What is the purpose of musical scales?

Musical scales serve as the foundation for melody and harmony in music, providing a structured framework of notes that musicians can use to create and improvise. They help define the tonal center or key of a piece, guiding the emotional and aesthetic direction of the music. Scales also facilitate communication among musicians, as they establish common reference points for composition and performance. Ultimately, they contribute to the richness and variety of musical expression across different genres and cultures.