This feature allows you to see all bookings, for all properties in the system. You can`t edit anything here, but just display, sort and maybe print this info. The table is really self explanatory, so there`s no need for any additional explanations.
The only thing we need to add is that some server's might throw a fatal error complaining about bcmod. This is a fairly common feature in PHP but your host's may not have built your PHP installation with the functionality. You'll need to contact them to ask them to enable it.