To best moderate Idea Hub, read the following topics that will dispel your "what is what" doubts
Meta Portal - Home Page with a list of your projects - Idea Portals
Idea Portal - a place where users can publish their ideas, evaluate and enter into a discussion of other ideas
Idea - an idea submitted by the user.
Brainstorm - discussion on one idea
Moderator - a person who manages the Idea Portal from both Jiry and the Portal
Committee - a committee inside your organization consisting of people responsible for project development
Assessment Session - an idea assessment session for the Committee