It's easy to look up to the sky and see a bunch of nothing. I'm always in wonder when there are lots of unusual clouds because it gives great dimension to an otherwise endless blue void. On the ground, we draw imaginary lines all over the land, making states, counties, cities, and a multitude of other borders.
In the air, similar lines are drawn, creating different segments of airspace, but it's a lot moe challenging to put signs up in the air showing the boundaries - they keep falling every time one is put up. As a result, we must rely on maps to tell us where the airspace is, but visualizing the airspace makes it a lot easier to understand. Whether you fly airplanes or drones, understanding where the different airspace is and what it means is critical. There are lots of nuances and exceptions to basic airspace rules, but let's break down the basics for a good overview of the concept.