permission allows your app to access the Ads Insights API
to pull ads report information for ad accounts you own or have been granted access to by the owner, or owners, of other ad accounts through this permission. This permissions also grants your app access to the Server-Side API
to allow advertisers to send web events from their servers directly to Facebook. You can use this permission to provide API access to your ad performance data for use in custom dashboards and data analytics or to send web events from your server directly to Facebook.