What is a king or queen of a country?

A king or queen is a sovereign ruler of a monarchy, often inheriting their position through royal lineage. They typically serve as the ceremonial head of state, embodying national identity and traditions, while their powers can vary significantly between constitutional and absolute monarchies. In constitutional monarchies, their authority is largely symbolic and regulated by a constitution, whereas in absolute monarchies, they may hold significant governing power. Their roles often involve representing the nation in diplomatic matters and participating in cultural and public events.