To get notified only about some specific events, one can use a combination of ruleId, eventSource and eventType filters when subscribing to notifications. For example, if users want to get notified when their devices' battery level is too low, they can subscribe to notifications with the following filters: eventSource = battery and eventType = BELOW_RANGE. If users are interested in a specific geofence events and want to get notified immediately when any of their devices transition inside the geofence, they can subscribe to notifications with the following filters: ruleId = 'the-id-of-your-geofence' and eventType = INSIDE_GEOFENCE.