Tertiary Industry. Tertiary industry sectors act as logistics, distribution, and intermediaries in the production chain of a product. Tertiary industries need to reach the end customer of a product and are the final stage of that product from production to supply to the market.

Some specific examples, such as education, academic research, scientific and technological research and development, the legal profession, and health care, are the tertiary industries for operational products such as textbooks, teaching aids, laboratory aids, and medical aids, and for conceptual products such as constitutions, laws, and scientific theories.

Expanded:

The tertiary industry of a product is the final stage of a product from its production to the point where it reaches its end customer.

Because every product has its own unique production chain, the tertiary industry has different meanings for different products. The tertiary industry in the production chain of a cell phone is the logistics, wholesale, distribution and maintenance of the cell phone, while for a _ building, its tertiary industry is the real estate agent.

The third-level industry needs to contact the end customer of the product, is the final stage of the product from production to the finished product, such as catering, passenger transportation, distribution, art auctions, real estate agency, respectively, is the third-level industry of the food, transportation, commodities, works of art, and buildings of these products.

Tertiary industry in developed countries accounted for more than 70% of the gross domestic product; in some developing countries, the proportion is about 55-65%.

Baidu Encyclopedia - Tertiary Industry