Send email notifications and show policy tips for DLP policies – Microsoft Purview (compliance)

Microsoft Purview data loss prevention (DLP) policy can identify, monitor, and protect sensitive information across Office 365. When you create a DLP policy, you can enable User notifications. When user notifications are enabled, Microsoft 365 sends out both email notifications and policy tips. You can customize who notification emails are sent to, the email text and the policy tip text. Email notifications can be sent only to individual recipients, not groups or distribution lists. Only new content will trigger an email notification, but not email notifications.”]

Source: https://docs.microsoft.com/en-us/microsoft-365/compliance/use-notifications-and-policy-tips?view=o365-worldwide