The ACT Admission Ticket "Student Messages"?

<p>Hi everyone. First of all good luck to those of you who will be taking the ACT exam in Cali in an hour!
I have a question regarding my ACT Admission Ticket. It’s just out of curiosity but on the bottom left corner it says “Student Messages” and under that it says ACT ID. What does that mean? Also, top right of my ticket, it has the group. What are they? Thank you.</p>