General terminologies used in out of box ticket setup

• Submitted by: This is the creator of the ticket. This can be an end-user or a support staff depending on the setup in your organization. 
• Requested For: This is the user for whom the ticket is created for. This can be the same or different from the user in Submitted by field. 
• Assigned To: This is the support staff/agent to whom the ticket has been assigned. This is the user who works on the tickets. 
• Attachment: This is a feature in our ticketing to support attaching images such as screenshot, errors etc. 

NOTE: The above may vary depending on the customization of your ticketing model.