Canada is a constitutional monarchy. In this system, the Queen or King of Canada is the head of state, while the Prime Minister is the head of government. The functions of the monarch are generally carried out by her representative, the Governor General (federal) and the Lieutenant-Governor (provincial). These duties include promoting Canadian sovereignty, serving as Commander-in-Chief, presentation of orders, decorations, medals and awards, and others.
The head of government is the Prime Minister. The three main levels of government are federal, provincial or territorial, and municipal. Each level has different areas of responsibility depending on geography and types of services.