You can now stop Hangouts Chat notifications from breaking your concentration when you're in the zone... or taking a short nap after a stressful task. Google has updated its Slack rival with the ability to block notifications for a set amount of time -- just click on your status button and choose from the snooze notification options in the drop-down menu. You can choose to block alerts for as short as 30 minutes to as long as 8 hours, but you have to do so manually each time and can't set a schedule for it.