What is the structure of a quatrain?

A quatrain consists of four lines, making it a common form in poetry. This structure allows for various rhyme schemes and meter, often creating a rhythmic and melodic quality that enhances the overall impact of the poem. Quatrains can convey complete thoughts, emotions, or narratives within their concise form, enabling poets to explore themes with clarity and brevity. The use of four lines can also facilitate various poetic devices, such as alternating rhymes or patterns, which add to the richness and musicality of the work. This distinctive structure makes quatrains versatile and popular among poets across different genres and eras.