It is the location from where the business is performed primarily.
Step-by-step explanation:
If a business runs from multiple places or has many factories all over, the primary address is the headquarters or office that manages all these different avenues.
Primary business address is always the center of a particular business.
It must be written like any address but can be seen as different from the registered address of the company.
This is the address used for contact by all clients and other business.