Difference between members directory, directory and classifieds

Hello

I am not clear on the differences between the members directory, directory and classifieds. It looks like I would want an integration of all 3 because I want to build a talent database/directory like LinkedIn.

I want to make it better than linkedin with more focused profiles and ways to search based on key words, profiles and possibly even a numbered classification system for ranking talent.

For example, users would rate their skill level on a 1 to 5 scale for specific core competencies.

You could search for talent and skill level, and include other factors.

Users could also post ‘classifieds’ advertising new skills learned or experiences gained, etc.Employers looking for talent could post ads and job openings.

Dustin