Within economics, margin is a concept used to describe the current level of consumption or production of a good or service. Margin also encompasses various concepts within economics, denoted as marginal concepts, which are used to explain the specific change in the quantity of goods and services produced and consumed. These concepts are central to the economic theory of marginalism. This is a theory that states that economic decisions are made in reference to incremental units at the margin, and it further suggests that the decision on whether an individual or entity will obtain additional units of a good or service depending on the marginal utility of the product.