I'll try to give advice on every magic in the game!

[Maple]

bleed stack
is bleeding
deal extra damage
when you hit them while theyre bleeding
with a magic that causes bleeding

How Does Bleed Stacking Work

It just means that each individual bleed can overlap each other, e.g happen at once. Let’s say bleed does 17 per tick, and you have a 2 stacked. It would do 34 per tick.