Image: WhatsApp
A recent update to WhatsApp simplifies how admins manage membership. You can quickly access all the requests to join a group in one place. You can click on an "X" or a checkmark to either reject or approve a user.
The new update also makes it easier to find out which groups you have in common with your contacts. You can now search for a contact's name to see which groups you have in common. These features come months after WhatsApp launched Communities, a new feature that offers larger, more structured discussion groups. You can expect this update to come in the next few weeks.