Activity Stream (PN)-

The Activity Stream refers to a chronological list or feed of interactions, updates, and system-generated notifications related to a particular record (e.g., contact, opportunity, case) within a CRM system.

PN (Post Notification) in this context could denote “Post Notification”, possibly a label for entries that were automatically generated.

Explanation:-

This activity stream includes automatic Yammer posts, meaning the system is configured to send updates or notes to a connected Yammer enterprise social network. These automatic posts might be triggered by actions such as:

• Record creation or updates
• Status changes
• Comments or notes added
• Workflow events