The "Current Status" screen shows you an up to the minute snapshot of where you are at through the workday.   

It shows the number of people currently signed in, not signed in and signed out and will update automatically (you do not need to refresh the page).

For larger days and where relevant, this screen will also be broken by character, call time and unit. For example, this can be helpful to see at a glance if you are still waiting for anyone or to check that a particular group of characters has arrived and been signed in.