How do I approve or preapprove who gets added to a group I admin?
If you’re a group admin, you can choose to approve who joins your group.
To turn on membership approval:
1. Tap Main Menu then selects your group.
2. Tap the three dots, More and then tap View Group Info.
3. Tap Edit Group Settings.
4. Below Membership Approval, tap Any member can add members, but an admin or a moderator must approve them.
5. Tap Save at the bottom.
Read: How to Search For Post in a Group
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