A server is a computer that serves information to other computers. These computers, called clients, can connect to a server through either a local area network (LAN) or a wide area network (WAN), such as the Internet.
This setup will enable you to have a central store of resources (files and documents, bespoke software for your business, printers, scanners, archives etc.) which can be shared with everyone within the Company based on permissions for each user.
These resources will be backed up locally and in the cloud automatically every day – so in the case of an unseen disaster your Business can be up and running in a very short time without any loss of Company data.