A rhyme is a repetition of similar sounding words, occurring at the end of lines in poems or songs. Writers use rhyme to create a musical quality in their work, which can enhance the aesthetic pleasure of reading. Rhymes help to unify a poem's structure and can emphasize particular words or themes, making the poem more memorable and engaging. Additionally, rhyme can establish a rhythm, aiding in the flow and pacing of the poem. This rhythmic quality can also evoke certain emotions or moods, reinforcing the poem's overall impact.