There are three sections within your ticket displaying different information. Messages shows the communication between you and the person who sent in the ticket, the solution of the ticket and any internal comments. Related Info shows information about the contact, account and the ticket history. FAQ shows any tickets that you have added to your FAQ that can be leveraged for the ticket you are currently on.
Messages
Related Info
The Related Info section shows information related to the contact, account associated to the ticket as well as the ticket history.
Ticket
The Ticket History will show any updates that have been made to the ticket along with who made the change (Name), the status of the ticket at the time of the change (Status), and when the change was made (Date & Time).
Contact
The Contact History will show all tickets that have been associated to the contact on this ticket.
Account
The Account History will show all tickets that have been associated to the account on this ticket.