How do I exclude users who have already received a particular push notification from a new campaign?

To avoid sending redundant messages, you can create a segment that identifies users who have already received a specific push notification. You can then use this segment to exclude these users from new campaigns.

This is typically done by using the PW_NotificationSend event along with its message_id attribute (or a similar attribute that uniquely identifies the message).

Steps to create an exclusion segment:

1. Find the message_id: Locate the message_id (often referred to as Push ID, Message Code, or Campaign Code) of the push notification whose recipients you want to exclude. This ID is usually available in the message report or statistics section for that specific push notification.
2. Create the segment of users who received the specific push:
   • Go to your segmentation tool.
   • Create a new segment.
   • Add a filter condition based on Event activity.
   • Select the PW_NotificationSend event.
   • Set the condition for the event to have occurred (e.g., at least 1 time ever).
   • Add an Attribute condition to this event:
     • Attribute: message_id (or the relevant attribute name for message identifiers in your setup)
     • Operator: is (or equals)
     • Value: Enter the message_id you found in step 1.
3. Use this segment for exclusion: When setting up your new campaign, select the segment you just created as an exclusion filter. This means the campaign will not be sent to users who are part of this segment.

Important Notes:

* The PW_NotificationSend event and its message_id attribute start collecting data from when the event is enabled and configured for your project. This method will reliably work for excluding recipients of pushes sent after this event was activated and tracking the message_id.

* If you need to exclude recipients of a push sent before the PW_NotificationSend event was fully tracking this data for your project, and you have the message_id, please contact support for assistance. It might be possible to create such a segment manually.

* Alternatively, if your goal is to exclude users who opened a specific push, you might be able to use the PW_NotificationOpen event if it includes an attribute for the message or campaign ID (e.g., pw_msg_id).