What is G20?

 The G20, or Group of Twenty, is an international forum consisting of 19 individual countries and the European Union. It was established to promote international financial stability and sustainable economic growth. The G20 members represent a significant portion of the world's economy, accounting for around 80% of global GDP (Gross Domestic Product).

Here are the member countries of the G20 as of my last knowledge update in September 2021:

1. Argentina
2. Australia
3. Brazil
4. Canada
5. China
6. France
7. Germany
8. India
9. Indonesia
10. Italy
11. Japan
12. Mexico
13. Russia
14. Saudi Arabia
15. South Africa
16. South Korea
17. Turkey
18. United Kingdom
19. United States
20. European Union (represented by the European Commission and the European Central Bank)

The G20 meetings provide a platform for these nations to discuss and coordinate on global economic issues, financial market stability, international trade, development, climate change, and other key global challenges. The G20 also holds annual summits where leaders from member countries gather to discuss and make decisions on these issues. Please note that the composition of the G20 may change over time, so it's a good idea to check for any updates if needed.