What is the concept of courier service?

In the context of growing e-commerce, express delivery services have become an indispensable part of the commodity economy.
The concept of express delivery is massively popular and current consumers seem to be equating the general delivery of goods with them.

Understand delivery services in a short time or be considered as a courier service

So what is the express delivery? What are the different shipping services and courier services?
Find out more in detail through the article below.
What is a courier service?
Previously, the condition of facilities was limited, roads were difficult to transport goods / mail to the address between the provinces take a lot of time. The sender and receiver do not know specifically when their goods / packages will arrive.