should I use nordvpn on MacBook Air?

Impossible to answer. As we don't know whether or not your work flow or your use of the Mac require a VPN.

You are entirely free to use one if you want to.

There's nothing wrong or harmful about using a VPN such as Nord.

If you don't know what a VPN does, then you probably don't need it.

Fransvdk wrote:

should I use nordvpn on MacBook Air?

If you are using a VPN to create a secure point-to-point tunnel to your workplace or other organization, contact the network admin at the VPN server end of the tunnel to get their recommendation on which VPN client works best with their VPN configuration.