Established in 1999, the group of 20 – also known as G20 – is an informal gathering between heads of state from 20 of the world’s largest economies. While the annual summit has traditionally focused on economic cooperation, the agenda has since expanded to include talks on how to respond to climate change, the COVID-19 pandemic, and most recently Russia’s war against Ukraine. How do these summits work and what can we expect from the upcoming September meeting in India?