If your ticket is an "UNRESERVED SEATING LEVEL 1 / PITCH STANDING TICKET," this means the following:
1) You have access to the pitch/floor for the event (noted as "STANDING" on diagram below).
2) You have access to around 15,000 unreserved seats on level 1 on a first come first serve basis.
In the diagram below, you would have access to the "STANDING" area, as well as all seats in sections 102-125 & 142.
Guest with Level 1,2,3,4,5 seats have been preassigned a specific seat for the event.
Seating layouts may alter for different gigs and unreserved seating may not be available for all events.