In economics, "complements" refer to goods or services that are often used together. When the price of one complement decreases, the demand for the other typically increases. For example, if the price of printer ink drops, more people may buy printers, as they find it more affordable to maintain them. In everyday life, complements can also refer to items that enhance each other. For instance, peanut butter and jelly are classic food complements; they are commonly paired in sandwiches. When enjoyed together, they create a more satisfying taste experience than when consumed separately.