What describes the best program music?

The best program music is characterized by its ability to evoke vivid imagery and emotions through instrumental composition, often inspired by a specific narrative, scene, or theme. It effectively translates non-musical ideas into sound, allowing listeners to connect with a story or concept without lyrics. Composers use motifs, orchestration, and dynamic contrasts to enhance the storytelling aspect, making the music immersive and evocative. Notable examples include works like Berlioz's "Symphonie Fantastique" and Smetana's "Má vlast."