Hello, I am here to help you. It probably depends on which vpn you are using.But there are still some ways to determine if vpn is properly working or not. First thing first,you might see a notification that vpn is on.Or you might want to go to the vpn application to see if it is working. Another and probably most effective way to see if your vpn is working properly is that your ip address will be changed or you location will be switched to a different country. Thank you.