What is the G20 summit, and what do world leaders talk about?

World leaders from 19 countries – and the European Union – are meeting in Osaka, Japan, from Friday.

They are the "Group of 20" – G20 for short – but what exactly is the summit about, and why is it important?

What is the G20?

The G20 is an annual meeting of leaders from the countries with the largest and fastest-growing economies. Its members account for 85% of the world's GDP, and two-thirds of its population.