Question about concert seating!

[Brendan7767]

So I have never been to a concert before and I plan on seeing Coldplay on 8/6/17 in FedExField in Landover, MD.

I have purchased a ticket at Section B4, Row 10, Seat 1. It is right near the central circle coming across the walkway on stage. You can view it on this map....

 

https://www1.ticketmaster.com/coldplay-a-head-full-of-dreams-landover-maryland-08-06-2017/event/1500514604705C6C?artistid=806431&majorcatid=10001&minorcatid=60#efeat4212

 

The ticket says "Field Reserved" and not general admission. Does this mean I get to be right on the spot or is it first come first serve for anyone in the B4 region because all standard tickets in that area regardless of location where $220 + fees.