What is the difference between demand and aggregate demand?

Demand refers to the quantity of a specific good or service that consumers are willing and able to buy at a given price. Aggregate demand, on the other hand, refers to the total quantity of all goods and services that all consumers, businesses, and governments in an economy are willing and able to buy at a given price level. In essence, demand focuses on individual products, while aggregate demand looks at the overall demand in an economy.