GDP (gross domestic product) is the total value of all goods and services produced in a country over a period of time.
In the US, the Bureau of Economic Analysis publishes GDP every quarter, usually reported as an annualized growth rate after adjusting for inflation ('real GDP'). Each quarter gets an advance estimate followed by two revisions.
Why it matters to you
GDP growth is the broadest scorecard of the economy. Strong growth usually means more jobs; shrinking GDP raises recession worries.