When reviewing a guest timeline, you are able to see which campaigns they have received in the past. In the bottom left corner of each Campaign Notification is a status for the notification. This status is related to Push Notifications (PN) and the brand's ability to send PN to a guest.
Sent On - The PN was successfully delivered to the guest's device on the date and time listed.
Pending - Action needs to be taken before the PN can be delivered. Indicates that the Push Services certificate is expired.
Not Notifiable - PN is not delivered as guest is not subscribed to Marketing PN. Possible that the brand is not using Punchh to deliver PN.