LOGIN 2018 tickets are personal tickets. Every ticket must have its owner.
Ticket assignation means assigning your details to exact ticket - filling-in a quick questionnaire. This questionnaire appears at the checkout process if 1 ticket is bought and after the checkout if 2 or more tickets are bought.
Important: all LOGIN 2018 tickets must be assigned to a person to become valid. To avoid the stress with filling-in your details while already waiting in a line to take your badge and run to your must hear talk, please be sure to assign your ticket before the event :)
More information how to assign your tickets can be found here.