Spin, screw, spin dup

Does anyone know how to use these because I’m kind of clueless I’ve tried a number of tutorials but it doesn’t seem to work and stuff. Anyone have any ideas. Can you show me any tutorials I mean I have knowledge of what they can do but I need to know basically what these for functions really are: Degree, steps, and turns.

Degree is how many degrees of arc you want the above functions to work in.
Step is how many steps in that arc.
Turns is how many times around a circle you want to go (not sure how it works with less than 360).

Remember also that you need to place your 3d cursor at the center of what you are going to spin, etc, otherwise you can get some interesting effects.