IWTL how to use a compass

I know there are plenty resources online, but I can still not seem to fully grasp how to use them. I know the needle always shows north no matter where you stand. And that the dial can be turned to help with navigation.

But for example if I am somewhere in the wild and happen to have a map, how do I orient my compass in a way that matches with the map. How do I know which is north on the map?

I just watched a video on this and I kind of understand it, but I am also still confused.