A separate Wi-Fi for visitors that gets them online without letting them see your business computers.
Like a public waiting room next to the office: visitors sit comfortably and cannot walk through to the filing cabinets.
Network covers access points set up with a staff network and a guest network that cannot see each other.
Is a guest network really necessary? If anyone who is not an employee ever asks for the Wi-Fi password, yes. A guest on your main network can reach the same shared folders and printers that you can.

Every WILDCARD card exists to solve one named problem. Find yours.