By default, each time someone new joins a group Guild sends members a notification and posts an announcement to the group.
Individual members can choose to turn off notifications for a group, but you can also stop new joiner announcements.
- Go to the web admin
- On the 'Groups' screen, tap the name of your group
- Tap 'Advanced settings' at the top of the page
- Turn off 'New joiner announcements' (switch to grey).
Note this also turns off notifications for hosts and moderators. Only administrators will be able to access a member list with the date that new members joined.