On the Registration page of the event, click on the Join Event button.
I the Organizer has allowed Attendees to buy buy multiple tickets at a time, you will see the option to choose how many of each ticket you would like to purchase.
Select the number and type of each ticket you'd like to purchase and click Continue to proceed.
Next you will need to fill in the basic info for all the attendees you’d like to invite. Here you can also register yourself for the event by ticking the Assign ticket to me box. This will automatically fill in your details. Note that you can assign only one ticket to each attendee. Click Continue to proceed.
On the next page you will be asked to provide a payment method and answer additional questions for the tickets assigned to yourself, if set by the event organizer. When ready click Complete registration to finish.
Invited users will receive an invitation to the email you provided with a unique link to register for the event. Through this email, they can accept or decline an invitation and even remove their data. If they accept, when they go to the event page they will be asked to answer additional registration questions, if set by the event organizer.
Done! You can go on to access the event when it is time.