what is the purpose of IDIOMS and I want some important idioms

'Idiom' means - "one of a kind and indicates that a phrase is being used with a special meaning". Examples:- ♧ " Butterflies in your stomach" is an idiomatic expression that means you are anxious and have a nervous feeling in your stomach. Example:- I am having 'butterflies in my stomach'. ♧ "Pigs Fly" refers to something that is highly unlikely to ever happen. Example:- You will go to jogging when 'pigs fly'. ♧ "Bed of roses" is an English expression, which means an easy and peaceful life. Example:- No one has 'bed of roses'.