Weight in notification
When multiple Notifications are simultaneously triggered for the same record and addressed to the same recipient(s), the Weight field value is used to determine which notification(s) to send and which to skip. Use the Weight field to prevent recipients from receiving multiple or conflicting notifications for the same target table record or event.
Notifications with a Weight value of zero are always sent.
If notifications have non-zero Weight values, only the notification with the highest Weight value is sent.
If multiple notifications have the same non-zero Weight value and that value is the highest, all notifications with that value are sent.