A good way to screen who joins your Facebook group is to ask them a set of questions. These questions can be anything you like. Maybe you want to make sure the live in your town or your state. You could ask them to agree with your group’s policies and give them a short list of what you require of them as a member.
Here’s how to add Membership Questions in a Facebook Group
1. Go to your Facebook group and click the More button on the menu located under the Group cover image.
2. Click Moderate Group.
3. Click Membership Questions.
Add or change membership questions and you’re done.