The fruit or vegetable vendors sell the farm produce to household consumers. Similarly, doctors, nurses, teachers, lawyers and pilots provide their services to those who need them. There are technicians who repair and service electronic items including mobile phones and televisions, mechanics who repair vehicles like cars and tractors, and electricians who ensure regular supply of electricity.
Their services make our lives easier. Similarly, communication services through mobile and internet, software development, and services at hotels, restaurants, banks, schools, hospitals, airports, shops, warehouses, etc. are all examples of tertiary sector economic activities. This sector is also called the service sector.