The Notion Teamspace Owner Added rule detects when a user is granted ownership rights in a Notion Teamspace, which may indicate a potential privilege escalation. It triggers based on entries in Notion's audit logs, specifically looking for the event types related to a member being added with an owner role. This rule is significant in enterprise environments where role and permission management is critical for security. It aims to flag situations that require further investigation, particularly if they are unexpected or unauthorized. The standard practice is to follow up with the affected user to ascertain the legitimacy of the change, especially if performed by an account that may be seen as suspicious.