It is a common conception that a well presented dish is more appealing than a plain, usual plate of food. Consider the same with language. Language is a tool of communication whether in written or spoken form. So to make our written or spoken expression more impressive, figurative language can be used.
Figurative language consists of various devices such as Metaphors, similes, alliteration, personification, idioms and many more. The purpose of these devices is to broaden the meanings of the words. The idiom “raining cats and dogs” does not mean an actual rain of cats and dogs. It means a heavy rain. When such terms are used it makes the conversation interesting and attractive.
This also creates a dimension in a language as it gives a deeper meaning to the words other than the apparent meaning. Literature therefore seems more interesting to many people. All the literary works majorly use figurative language. Poetry which is termed as ‘overflow of powerful feelings’ is blank without these literary devices.
Here are a few examples of the literary devices:
Metaphor: a heart of gold
Simile: cool as a cucumber
Idiom: barking dogs seldom bite
Alliteration: red riding hood
So use of these devices does make a huge difference in writing/spoken expression. It increases the grasp on the language and adds variety to the expression.