configuration microswitch

excuse me a question I have 4 microswitches wired and I have placed on pins 4-5-6-7 (NO),
now the town I put them all together by a board made ??by me but I have to connect them to ground (GND)?

Yes, sure. You can connect them to ground and activate internal pull-up registers on all 4 digital inputs.

ok but understand this pull-up is it?
then in what sense the logs?

In code you read HIGH when switch is Open, and LOW when it Close

ok thanks