Turn on priority notifications

When you turn on Priority notifications for a group chat, you receive a distinct audio prompt for messages that you receive in the chat, even if you have turned off sounds for standard messages.
Go to The settings icon > Notifications and verify that Play Sound for Priority Notifications is selected.
  1. In a group chat, click The edit icon beside the chat name.
  2. Click the check box beside Priority Notifications.
  3. Click The chat icon to return to the chat.