We want to be able to filter by specific metadata template and attribute value at user activity.

By setting the metadata that means the confidential level to the folder and assigning the metadata in cascade, we can track the subsequent access status of the objects placed under the target folder.
By tracking the activity of files with specific metadata (such as sensitivity level), we can detect data usage and security issues.
By using such a method, we can detect security problems that could not be detected in the past, such as image data that is difficult to detect with DLP.