As an administrator of a conference you can manage the registrations for the conference from the platform.
For doing so, you have these admin sections:
Registrations Types allows you to define which ways of registering participants will have. For instance if there are a number of prices depending if the attendees are students or workers.
User Registrations allows you to confirm the requests for attending the conference.
Invites allows you to invite participants to the conference.
Certificates of Attendance allows you to configure and send certificates of attendance in PDF format to people that has gone to the conference.