A sonnet is a 14-line poem written in iambic pentameter with a specific rhyme scheme, depending on the type of sonnet. It introduces a problem in the beginning and offers a resolution after the turn. The most common types are the English (Shakespearean) sonnet with a rhyme scheme of abab cdcd efef gg, and the Italian (Petrarchan) sonnet with an octave rhyme scheme of abbaabba and sestet variations of c, d, e. Sonnets use form and figurative language like metaphor and imagery to influence meaning.