Progressive Metal is a subgenre of heavy metal that combines elements of progressive rock with the intensity and complexity of metal music. It is characterized by intricate song structures, unusual time signatures, and a focus on musicianship. Bands often incorporate a wide range of influences, including classical music, jazz, and electronic sounds, creating a rich and diverse listening experience. Lyrically, Progressive Metal often explores complex themes, such as philosophy, science fiction, and personal introspection. Notable bands in this genre include Dream Theater, Opeth, and Symphony X, each known for their technical proficiency and innovative compositions.