Turn off notifications for a specific chat by muting it. Hover over a chat and click the bell icon (Figure 1):
Figure 1 Click the bell icon to mute a chat
Click the same icon to unmute your chat. You can also turn off all notifications by switching off Allow notifications at the top of the notification center (Figure 2):
Figure 2 Switch off Allow notifications to turn off notifications
Messages will appear in your chat list, but you won’t get alerts or desktop notifications. Switch Allow notifications to turn your notifications back on.