Tertiary sector is an economic sector that involves the provision of services. This sector includes various economic activities. Examples are trade, banking, insurance, transportation, health, real estate, accommodation, and education. Services from this sector are essential to support other economic sectors, including primary and secondary sectors.
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The economic structure of a country usually develops from the primary sector to the secondary sector, then to the tertiary sector. Traditional economies typically rely on the primary sector. Then, as the economy developed and industrialization progressed, the secondary and tertiary sectors began to take on more roles.