What is one common structure for jazz compositions?

The 12-bar blues form is one of the most prevalent and recognizable structures in jazz compositions. This form is characterized by a repeating chord progression that lasts for 12 measures, typically using three chords: the I, IV, and V chords of a given key. This structure facilitates both improvisation and composition, making it a foundational element within jazz. The simplicity and flexibility of the 12-bar blues allow musicians to create variations, add embellishments, and explore expressive melodies, which are hallmarks of jazz performance.

While the other forms listed carry significance in various musical contexts, they are not as universally adopted in jazz as the 12-bar blues. The 32-bar form, often utilized in popular music and the AABA structure, is common but less standardized in jazz compositions. The 24-bar and 16-bar forms are also used but don't hold the same iconic status or widespread application as the 12-bar blues. This highlights why the 12-bar blues format remains a crucial component of jazz music, influencing countless compositions and improvisational practices within the genre.