This policy sets the maximum number of printers (of each type) that the Add Printer wizard will display on a computer on ...

This policy sets the maximum number of printers (of each type) that the Add Printer wizard will display on a computer on an unmanaged network (when the computer is not able to reach a domain controller, e.g. a domain-joined laptop on a home network.)

If this setting is disabled, the network scan page will not be displayed.

If this setting is not configured, the Add Printer wizard will display the default number of printers of each type:
TCP/IP printers: 50
Web Services printers: 50
Bluetooth printers: 10
Shared printers: 50

If you would like to not display printers of a certain type, enable this policy and set the number of printers to display to 0.