Figures of speech add detail to speaking and writing and make the experience to readers much more entertaining. For example, using similies can help the reader imagine what you are trying to express. Instead of saying "It was sweet", you could say "It was as sweet as honey". The reader will understand how sweet this is and think of it that way. Using alliteration gives a sound effect that will help shape the way the reader is thinking. Using "POW!" might mean that something exploded or broke, and using "Crack!" might mean that something cracked and broke.
