Does Curve Circle’s Normal point to the next point on the circle?
In this simple example, I aligned Z to the Normal of the Curve Circle but the result is quite different from my understanding. Why it is pointing outward, not tangent to the curve?
I am using Blender 3.4.1.
Thanks!

They always do. Normals are per definition perpendicular to a given entity like a plane. Its like that for points on a 2d line too and in principle also true for lines in 3d, but mathematically there is an additional degree of freedom in there then. So normally it would be not just a specific single vector but rather all those who lie in the perpendicular plane. In blender this is a bit simplified.