Attendees
In "Attendees" section you can see people who are attending your event.
You can use it to mark people's presence.
You see how many tickets each person has bought and you can browse their profiles.
Add Attendee
If an attendee paid you in a different way, you can always add them on your own. Click "Add Attendee", fill in their email address and choose what type of ticket should be assigned to them.