The head of the Commonwealth of Nations is the Queen of Great Britain. She is the symbolic head of the Commonwealth, which is made up of 54 member countries that were formerly part of the British Empire. While the role of the Queen is mostly ceremonial, she plays an important role in promoting the Commonwealth's values of democracy, human rights, and economic development. The chairman of the Conference of the Commonwealth Heads of Government is a position that rotates among the member countries and is responsible for organizing the biennial Commonwealth Heads of Government Meeting. The prime minister of Great Britain is not the head of the Commonwealth, but is a member of the organization. The secretary-general of the Commonwealth is responsible for the day-to-day administration of the organization.