Taylor Swift - Standing Room - Rogers Center

I've noticed there are several standing room sections/seats for sale on StubHub, but it's unclear if it's assigned places or just first come first serve situation. There appears to be the following sections with standing and obstructed:

Corona Bar

Social Section

Catch Bar

TD Park

I've seen some of the catch bar ones listed with seat number, although it says standing, but all the rest I've only seen generic listings without specific seats.

Does anyone know how each section works regarding assigned areas?

Also, any insight on how each of these section compare for views/obstruction?