This is basically a way for a member to select a keyword and for us to only show all the training/lessons/modules/courses that contain said keyword.
This could be used well in conjunction with a tagging system so that courses now also get tags/keywords associated with them.
When the member logs in they have an option to filter the courses they have access to - from there they can start consuming content.
Article explaining: https://www.searchenginejournal.com/technical-seo/faceted-navigation/
Plugin that offers same tech: https://facetwp.com/