"General Admission" or "GA" is a section in which there are no assigned seats. Typically, these sections are "Standing Room Only" (SRO), or at some venues, lawn seating, and there are no physical seats. “Lawn” seats will also be referred to as “GA” or “General Admission”. These are areas where there are no physical seats and fans stand or sit on the lawn within the venue.
These tickets are "first come, first serve" to get the best view of the stage.