Answer:
The formula for angular velocity is equal to angular rotation over time.
Let's refer to normal velocity and understand what that does.
Normal velocity is the change in position over time, which we would refer to it as the "speed". Measuring the speed shows how fast an object goes from point A to point B.
Angular velocity is the same case, where it's a measure of rotational speed. It's the overall rate of change of an angle, and a measure of how fast an object rotates around a center point.