What is a company registered office?

What is the relevance of Registered address for the Singapore Company? Why is it required?

Under the Companies Act, a registered office is an address in Singapore to which all correspondence and notices to the company can be sent. The registered office of a company must remain open and available to the public for not less than 3 hours during ordinary business hours on each business day.

The registered address must be a physical location (can be either a residential or commercial address) but cannot be a P.O. Box.

It should be possible for any member of the public to visit the office for any questions or inquiries pertaining to the company.