If the event organizer sent you a link to the Greenroom, this is what you need to know:
On the day of the event, the organizer will send you a link to join the StreamYard's Backstage Studio or it might send you a link to join the Greenroom instead.
The Greenroom is a waiting area for guests to prepare with hosts and producers before they enter the studio to go live on the Stage.
To know whether the link you have is to the Studio or the Greenroom, check what the Enter button says.
Using the Greenroom