Hyperbole is one of the most misunderstood figures of speech in literature. It is the art of using words in a somewhat exaggerated form. Writers, sometimes avoid it, in order to be construed as simple, straightforward and clear.
On the other hand, it is one of the richest figure of speech, even more effective than a plain metaphor. Its richness could be discovered especially in poetry and short stories.
When one is telling a story, one would like the reader to exclaim, "Ah, I get it." The use of hyperbole will be very useful to clarify the point. It may be quite exaggerated but the point is one is getting the message across.
Hyperbole is not for the light-hearted! It is not suited for those people who are so plain and drab. It makes ones heart flutter. It gives another level of meaning. In this sense, hyperbole is one of the top figure of speech. It's not for those who love mystery or enigma--use metaphor. It is ideal for one who likes a stimulation of the mind, a reckoning, not with a subtle flavour.