It is very often useful to find a Vector that points from one object in space to another.
For example, if we wanted to have a top-down 2D game where the player faces the mouse position, we would need to get the vector that points from the player to the world-space position of the mouse.
The answer is easier than you may think: we subtract positions in space to get the Vector.
// A vector that points from an origin position (Vector3) to the target position (Vector3). Vector3 pointing = target - origin;