Which economic indicator can show whether a country's economy is growing quickly or slowly?

Gross Domestic Product (GDP) is a key economic indicator that reflects the overall economic activity and growth of a country. A rising GDP indicates that the economy is expanding, while a stagnating or declining GDP suggests slower growth or contraction. Changes in GDP can signal trends in employment, consumer spending, and investment, making it a crucial measure of economic health. Additionally, GDP growth rates provide insights into the pace of economic expansion relative to previous periods.