Sorry in advance for the newbie question, but I can't seem to find a good answer. Recently, I've gotten into printed circuit boards and it is all still fairly new. I'm working towards creating a 4 layer pcb and I'm curious common practice for layer stack up. I've seen some places that use the outer layers as signal layers and internal two layers as GND and VCC and vice versa other places.
Is there any stack up for a four layer board (or any amount of layers for that matter) that is particularity advantageous?
Also from previous research it seems that having both a GND and VCC plane creates a small amount of capacitance, why is this useful?