Most events hosted by GLL require you to check-in prior to competing. The reason for this is to make sure that everyone is online and ready when the tournament starts.
The tournament details will tell you how long the check-in period is before the event starts. While only one member of the team needs to click the “Check in” button, it is important that you make sure you and your team are online and waiting to start the tournament.
If you do not check in in time for your event, you may not be allowed to compete.