Shakespeare uses language to create dramatic effects. His choice of rhyming couplets over freer blank verse may make a character appear fussy, comedic, or pompous. However, it may also be used to convey a character's sense of urgency.
The actors use the clues provided by Shakespeare when writing the text to help them develop their characters. The slow gravity of blank verse may suggest a way of speaking or walking for a character. Prose may suggest a humorous aspect to a character.