Does saving a player state array save all variables in each instance?

Hey guys- silly question I’m sure - I’m just starting to look into saving player stats etc fora persistent online game. I’ve learned that player States are the best place to save character specific stats that need to be consistent but I’m a bit confused on the saving of these variables.

Simply put: if I save the player state array from the game state (iirc?) will this save all the variables in each instance or do I have to save out each variable that if want to preserve individually?

Anybody that can enlighten me?