You will not receive a physical ticket for Tomorrowland Around The World. After your purchase, you will receive a confirmation email of your purchase from See Tickets. The product will also be visible in your Tomorrowland Account.
At the day of the event, you can enter the festival directly via the website or through your Tomorrowland Account. It is not possible to enter the festival without a Tomorrowland Account; make sure to log in to the website with the account you used to buy your ticket. Your ticket is linked to your email address.