Litotes consists of an understatement in which an affirmative is expressed by negating its opposite. Examples: Hada was not unaware of Samuel’s manipulation.
She didn’t dislike it.
Lev was not a little upset.
Litotes describes the object to which it refers not directly, but through negation of the opposite. The meaning is not clear. The reader stops to understand. Why use it if it stops the reader? If used in the right place and not often, litotes helps to make a statement in a fresh way.