End rhymes are a poetic device where the last words of two or more lines in a poem sound similar. This similarity can create a musical quality and enhance the overall rhythm of the poem. For example, in a couplet, the two lines often rhyme with each other, making the ending of each line memorable and engaging. Writers use end rhymes to emphasize certain ideas or emotions within their poetry. Common patterns include AABB or ABAB, where letters represent the rhyming sounds. By employing end rhymes, poets can create a sense of unity and structure, guiding the reader through their work.