Macroeconomics is the field of economics that studies the behavior of the aggregate economy. Macroeconomics examines economy-wide phenomena such as changes in unemployment, national income, rate of growth, gross domestic product, inflation and price levels.
Source: http://www.investopedia.com/terms/m/macroeconomics.asp#ixzz3ZkqLQLdh
Macroeconomic policy focuses on limiting the effects of the business cycle to achieve the economic goals of price stability, full employment, and growth.