What are Groups? Groups are forums. Groups are centered around a special interest,
such as "Muscle Cars" or "Sim Painters" or "Dale Jr. Fans", and the Group forum a gathering place for all those who share that interest.
Although joining a Group isn't necessary to read or post (unless the Group is private), by joining
the Group you will be notified of all new activity in that forum.
Search or browse the Groups to find a forum in your area of interest ... chances are there's one already active and rolling.
If you still don't see a Group forum suited for your interest or post, you may create one yourself.