The term "Commonwealth Realms" refers to a group of countries that share the same monarch as their head of state. Currently, there are 15 Commonwealth Realms, including nations like Canada, Australia, and New Zealand. These countries are part of the British Commonwealth, which is a political association of member states, most of which were formerly part of the British Empire.
Each Commonwealth Realm operates independently, with its own government and laws, but they all recognize King Charles III as their sovereign. This unique relationship allows them to maintain a connection to the British monarchy while enjoying their own national identities and governance.