The Domain Insights dashboard and API will not be available after May 2, 2017. Use Facebook Analytics for Apps to see referral traffic for your website and demographic details of your visitors. Read the Referral Insights with Facebook Analytics for Apps topic to learn more and get set up.
Access Insights Dashboard
Domain Insights shows all referral traffic to your domain from Facebook, including when people link to your site in their Facebook status messages, clicks on social plugins such as the Like or Share button, and more. Domain Insights also provides sharing metrics and demographic information per domain and per URL so you can optimize your content for sharing and better tailor your content to your audience.
By understanding and analyzing trends about usage and demographics as well as consumption and creation of content, you can be better equipped to improve your business and create better experiences with Facebook.
Facebook Analytics for Apps
Note: The App Insights API will continue to be supported at this time.