General admission usually means that you dont have a seat but can enter the standing room area......its actually quite good, most people stand up during the concert, being stuck in an assigned seat can suck big time as your view of the stage is cut off by those standing in front of you.
It usually means access to some of the nose bleed seats or standing on the floor. We always ended up standing on the floor anyway at Winterland in SF.
How much the tickets are
First come first served.
So, I'm going to an Ed Sheeran concert and I've bought general admission tickets. It looks like its right in front of the stage. Do I just show up and pick a spot? Thanks.