While you're tracking a room you are able to see the current speakers and listeners on the right side of the Current Room page.
To let you figure out if a listener is in your room for the first time or not, we've divided the current listeners into 2 sections.
Returning listeners: Shows you the people who are in your current room and have listened to you before.
First time listeners: Shows you the people who are in your current room and haven't listened to you before. That means these people are in your room for the first time.