The term is often used in modern culture for an action or idea that is expected or predictable, based on a prior event. Typically pejorative, "clichés" may or may not be true. Some are stereotypes, but some are simply truisms and facts. Clichés often are employed for comic effect, typically in fiction.
When can you use cliché?
Clichés can be used to explain beginning level concepts. For example, a how-to guide for expectant mothers might use the phrase “Remember, you're eating for two!” For characterization. Writers might have a character use clichés to demonstrate that they are not an original thinker.
What is considered cliché?
A cliché (UK: /ˈkliːʃeɪ/ or US: /kliˈʃeɪ/) is an element of an artistic work, saying, or idea that has become overused to the point of losing its original meaning or effect, even to the point of being trite or irritating, especially when at some earlier time it was considered meaningful or novel.