What is the most important aspect to highlight in a recruitment and selection training course?

I am running a course and just wonder what the 'golden nugget' is that really needs to be highlightedWhat is the most important aspect to highlight in a recruitment and selection training course?
I personally believe that the relationship of the number of years to achieve the qualification and the salary expected after a few years, is the best sailing point of any course.

Of course the interest in the topics is of grate importance too.