Choose a redirect URL and a password and the script will create you a link. Send this link to anyone you know (online) and the script will record their I.P. Click Login at the bottom of this page to login and view the IP addresses of those who have visited your link.
This is to prevent unauthorised people from viewing the IP access records.
This is where people will be redirected (sent to) when they visit the link. The default is Google, though you may want to change it.