The fastest way is by querying the API for updates (using the domains endpoint), which can be queried up to once per hour. For folks who prefer email notifications, the options are once per day or 4x per day. Also, while it’s not a notification per se, if you’re in the UI when a new domain comes in, you’ll see it at the top of the New domains list. You also might notice a brief animation of the stats box at the top of the dashboard for New or Watched. You can also see the same animation if you take an action such as moving domains from New to Watched or Ignored.