Essentially, the WOL shows each user that is visiting the forum at that time. On the Portal and Index pages, only the usernames are shown. On the 'Complete List' the last location and access time are shown.
Invisible users (users who have hidden their online status) will not be shown on the list, unless the user viewing the WOL has the permission to do so (by default the Administrators, Super Moderators, and Moderators). Invisible users will be marked with an asterisk ('*') at the end of their username.
On the 'Complete List', it is possible to access the 'Who was online today?' page at the bottom of the WOL.
On this page, all of the members who were online in the past 24 hours are shown.