Diminishing returns is a term used to describe a situation where the benefits of something get smaller with each additional use. For example, if your parents give you two pieces of candy and you eat one, you will feel really good. If you eat the second piece of candy, it will also taste really good, but you won't feel as good as you did when you ate the first one. This is because the first candy gave you more of a benefit than the second one. This is an example of diminishing returns.