A sestet is a stanza or a poem consisting of six lines. It is commonly found in various forms of poetry, including the sonnet, where it typically follows an octave, which has eight lines. The sestet can have different rhyme schemes, such as CDCDCD or CDECDE, depending on the poet's choice. In addition to its structural role, the sestet often serves to develop a theme or present a resolution to the ideas introduced in the preceding lines. This makes it an essential component in the overall flow and meaning of a poem, allowing for a concise expression of thoughts and emotions.