Jobs & Experts Plugin - is there a better tutorial on how to set this up?

I have no idea how to setup the plugin.
I want to add some vacancies but the jargon in your tutorial doesn't explain how it works. For example. What is a maximum job profile per user? Why would you have more than 1? What the hell is a job profile per user?
The list goes on. Is there a real demo of how this works?