The glossary GDP
The Gross Domestic Product is a measure of the economic activity and wealth creation of a country. More formally, it is the monetary value of all goods et services that that country produces over a certain period of time.
According to the IMF, the country with the largest GDP are the United States of America ($29 trillion) and the one with the smallest GDP is Tuvalu ($94 million).
Source: World Economic Outlook Database: October 2021 (imf.org)