The idea is simple, the outcome is brilliant. In short, the way it works: the admin tags a content (blog, article, video, etc.) for "Cars", another for "Boats". The user during registration is presented with an option for these two tags (tags can be made private, in which case only the admin can assign them), and s/he chooses Boats. Now the only content that s/he will see is ones taged for Boats (and content without tags).
This translates to getting the right information to the right audience!
