A couplet is a pair of consecutive lines in a poem that usually rhyme and have the same meter. This poetic form is often used to convey a complete thought or idea, making it a popular choice in various styles of poetry, including sonnets and ballads. Couplets can stand alone or be part of a larger poem. They are effective in creating rhythm and enhancing the musical quality of the text. Famous poets like William Shakespeare and Alexander Pope frequently employed couplets in their works, showcasing their versatility and appeal in literature.