If Cheat Off module is on, a user will not be able to login from multiple devices at the same time. You can use this module to help prevent members from sharing their login credentials.
No two users can be logged in at the same time with the same credentials.
This option decides for how long a user can be tracked, but it is not mandatory to change it. A bigger number means you track that user for a longer time.
You can set a specific page where the user will be redirected after he logs out.