Businesses need a contiguous network spread around the city, state, nation, the world. It needs to be secure and that is where VPN technology comes into play. It encrypts data in such a way the
NSA would spend lifetimes trying to decode the messages.
If you have more than one location you can connect them seamlessly via VPN tunnels. Site to site VPN connections for your business locations and remote access for employees that are away from the office.
And for those remote connections you can add in dual factor authentication to keep would be hackers at bay even if they have a stolen laptop or phone.
But always encrypt. There is nothing like peace of mind when traversing today's Internet and that is what VPN is all about.