When you have finished working in the site, please click the Logout link in the main menu at the top of the page. Logging out ends your session.
When a user uses the logout button to end their session the Login Status on the user page will say Logged Out. If a user lets their login time out or just closes the open browser window, their Login Status will say Expired. They are still able to log back in but this provides you information that the system did an auto save and the user did not log out and might have lost some data or forgotten what steps they have previously accomplished.