Most businesses are owned privately by individuals or groups of individuals, they are private sector businesses, the objective is often to make money - a profit for the owners
Some organisations in the private sector are non-profit making, such as charities, pressure groups, clubs and societies, they exist for reasons other than profit
Some goods and services are provided by organisations owned by central or local government, these are public sector organisations, the main purpose is to provide the goods and services that private enterprise fails to provide adequately