What is the purpose of this feature?
In case you are unsure if you logged out the last time, you may review if there are any other active sessions. If this is the case, you can terminate these sessions easily using this page.
What do I do if I suspect that I have been hacked?
If you discover sessions from any location that is not yours, please
change your password immediately and terminate all of the above sessions (and
reset auto-login).