G4 refers to a group of four major economies: United States, Japan, Germany, and United Kingdom. These countries are known for their significant influence on global economic policies and international trade. The G4 often collaborates on various issues, including economic stability, climate change, and security. The G4 nations are also involved in discussions related to the United Nations and other international organizations. They aim to address global challenges and promote cooperation among countries. Their collective efforts can shape policies that impact not only their own economies but also the broader international community.