If you click on Create Profile , a user profile will be created for you.
If you are creating a new profile then please ignore the first entry. Only the Name, Password, Password repeat and Email fields are required, and if providing Email please use the second Email field.
The "ID", shown in the response page, gets saved as a cookie in your browser for the system to temporarily recognize you. It will expire next midnight - except if you choose Remember login information forever, then the cookie won't expire. To re-login after expiry, use the name and password you provided in this form - and don't forget them! If you forget them, you can have the system send you the login data later by email (so provide a working email address or you will be in big trouble in that case).
Logout clears the cookie created at login. Login enables you to gain access to your user profile if you somehow lost the cookie or are on another machine. Save just updates your profile.