About the hook modifier

Documentation
1

Nowhere in the blender documentation about the ’ hook ’ modifier there is any mention that the vertices of the object have to be selected in edit mode , and then press "H’’ to bring up the hook dialogue (crucial for making it work ) .
If you just follow the documentation guidelines , there is no way to make it work
This should be fixed

2

I would change (here)

“As the hook moves, it pulls vertices from the mesh with it.”

to something like

“As object specified as hook moves, it pulls assigned vertices from the mesh with it. To assign selected vertices you can use the Assign button on the modifier panel or use the Add Hook menu.”