Requires App Review.
The pages_manage_metadata permission allows your app to subscribe and receive webhooks about activity on the Page, and to update settings on the Page. The allowed usage for this permission is to help a Page Admin administer and manage a Page. You may also use this permission to request analytics insights to improve your app and for marketing or advertising purposes, through the use of aggregated and de-identified or anonymized information (provided such data cannot be re-identified).