Why is macroeconomics important?

Macroeconomics is important because it allows the public to understand the economy as a whole, facilitating decisions relating to firms, fiscal policy and global economic policy.

Medical care, and all other output. per period of time, other things held constant. People study Macroeconomics to understand how the economy works on the larger scale in their country and to predict how it will affect the nation as a whole in the current and the future aspects.