What is the difference between aggregate expenditure and aggregate demand?

Aggregate expenditure refers to the total amount of spending in an economy, including consumption, investment, government spending, and net exports. Aggregate demand, on the other hand, represents the total quantity of goods and services that households, businesses, and the government are willing and able to buy at different price levels. In essence, aggregate expenditure is the total spending in an economy, while aggregate demand is the total demand for goods and services at various price levels.