Simply click the link and fill out the form, submit it, and it will generate a .pdf file with a QR code that you print and bring to the on site registration area at the convention. This form is not connected to any database, it is merely a utility for printing your own QR code. The QR code will contain all your demographic information, mildly encrypted and base64 encoded. As always you will need to have a valid government-issued photo ID with you as well to complete the on-site registration process.
After you've arrived on-site and gone through the registration cashier line, there will be a special line at data entry for those of you who have this pdf print out to speed up your progress through the process. Filling out this form shortens the wait by more than half the time.