Declare incident from handoff notifications

content/en/service_management/incident_management/declare.md

@@ -68,6 +68,21 @@
 
 After you declare an incident from Slack, it generates an incident channel.
 
+## From Handoff Notifications
+
+The Handoff Notification displays callout cards when you are paged or added to active incidents. These cards allow you to:
+
+- View and acknowledge On-Call pages
+- Navigate to relevant incident resources
+- Preview Slack messages from incident channels
+- Take direct actions on incidents
+
+{{< img src="/service_management/incidents/declare/handoff_notification_card.png" alt="Handoff notification card showing incident details with options to view, acknowledge, and take actions" style="width:100%;" >}}
+
+Handoff Notificiation cards remain visible until dismissed or until the incident status changes. You can expand, collapse, or dismiss the entire handoff container rather than individual cards.
+
+You can declare an incident from individual Handoff Notification cards.
+
 ## What's next
 
 {{< whatsnext desc="Add helpful information to your incident and give context to everyone that is involved in the investigation.">}}