The Commonwealth Heads of Government Meeting is a biennial summit meeting of the governmental leaders from all Commonwealth nations. Despite the name, the head of state may be present in the meeting instead of the head of government, especially among semi-presidential states. Every two years the meeting is held in a different member state and is chaired by that nation's respective prime minister or president, who becomes the Commonwealth Chair-in-Office until the next meeting. Queen Elizabeth II, who was the Head of the Commonwealth, attended every CHOGM beginning with Ottawa in 1973 until Perth in 2011, although her formal participation only began in 1997. She was represented by the Prince of Wales at the 2013 meeting as the 87-year-old monarch was curtailing long-distance travel. The Queen attended the 2015 summit in Malta and the 2018 summit in London, but was represented again by the Prince of Wales at the 2022 meeting in Rwanda.

The 2018 Commonwealth Heads of Government Meeting, also known as CHOGM 2018, was the 25th Meeting of the Heads of Government of the Commonwealth of Nations. It was held in the United Kingdom. The meeting had been planned to have been held by Vanuatu at the end of 2017, but was moved to the United Kingdom after the impact of Cyclone Pam on the infrastructure of Vanuatu. The meeting was then postponed to April 2018 due to other international commitments.