Hi there! Great question about group strategy! From what I've seen, it really depends on your audience size and niche specificity. One dedicated group works better for building a tight community and easier management - you get stronger engagement and loyalty.
Multiple subgroups make sense if you serve distinctly different audience segments or locations. This allows more targeted content but requires more admin time.
For driving traffic, focus on engagement quality over quantity: post valuable content consistently, respond quickly to comments, and use Facebook's native "Group Insights" to track what resonates. I've seen single focused groups convert 40% better than scattered communities because trust builds faster.
What's your niche and current audience size, and are you finding it challenging to manage engagement across multiple topics in one group?