Eight lines can form a complete stanza. An octave is a stanza of eight lines, most familiar from the first part of the Petrarchan sonnet. In that form the octave typically presents a situation, question, or problem; the following sestet offers a response or resolution. The rhyme scheme of the Petrarchan octave is usually abbaabba.

Octaves appear in other poetic forms as well. Some narrative poems use eight-line stanzas throughout. The length is long enough to develop an idea or image yet short enough to maintain formal tightness. Poets choose the octave when they want a substantial but still compact unit of thought.

Reading an octave attentively means noticing both its internal structure and its relationship to what follows. In a sonnet the turn, or volta, often occurs at the shift from octave to sestet. Even outside the sonnet, the eight-line stanza can create a sense of completeness or of deliberate pacing. The form is a reminder that poetic architecture shapes the way meaning unfolds.