Jailbreak manual:
Statistics tracking is a new feature in Jailbreak III. If you have set your Jailbreak Stats Password in the Jailbreak Preferences dialog, the server will keep a record of your frags when you play online, deaths, team releases, and many more unique stats during each game.
In addition, your stats will be sent to a central Jailbreak World Stats server. You can view your world stats record either on the Jailbreak World Stats website together with the stats of many other players or via the Show Stats button in the Player tab of the Jailbreak Preferences dialog.