The three primary concerns in macroeconomics are national output/GDP, Unemployment, and inflation.
National output/GDP is quite simply put the dollar amount of goods and services over a certain period of time such as a year. The news always seems to show us percentages to show how the economy is doing as far as the country is concerned. If growth is good then it leads to lower unemployment and higher wages for the economy. GDP is more drastic in its effect on the market. High growth lads to higher profits and value for companies while the opposite is that if growth is low then the profits are just as low.
Unemployment is simply the number of people without jobs that are looking for jobs in the marketplace. The national output/GDP effects this by showing that when there is higher growth that the unemployment levels are generally lower.
Inflation is a measurement of the rate at which prices rise.
These are all the contributing factors of how the economy works by showing the rise and fall of prices and the change in supply and demand caused by the national output and the fall or rise up the unemployment rates of the country.