Consumption

In economics, consumption refers to the final use of goods and services to provide utility.
Keynesian economics and aggregate consumption
In Keynesian economics aggregate consumption is total personal consumption expenditure, i.e., the purchase of currently produced goods and services out of income, out of savings (net worth), or from borrowed funds. It refers to that part of disposable income (income after taxes paid and payments received) that does not go to saving.
Discussions of human consumption of resources play an important role in both economics, environmentalism and geographical analysis.
In Keynesian economics, "consumption" is short-hand for personal consumption expenditure and is determined by the consumption function, especially by the marginal propensity to consume. It is part of aggregate demand or effective demand.
Consumption can also be defined as "the selection, adoption, use, disposal and recycling of goods and services", as opposed to their design, production and marketing.