A rhyme scheme is the pattern of rhymes at the end of each line in a poem. It is usually described using letters to represent sounds. For example, in a four-line stanza, if the first and third lines rhyme, and the second and fourth lines rhyme, the rhyme scheme is labeled as ABAB. Rhyme schemes can enhance the musical quality of poetry and help convey emotions. Different forms of poetry, such as sonnets or limericks, often have specific rhyme schemes that contribute to their structure and rhythm. Understanding rhyme schemes can deepen appreciation for poetic works.