[Plugin: SEO Ultimate] Facebook App ID field under Open Graph Integrator

Nobody knows?

I also wonder why…

In order for Open Graph Module to function you need to use Facebook API. You need the API Key.

This page will show you how to get one and then you simply add it to the Open Graph Integrator. Once you add it, then you can specify which images are associated with a page or post or twitter card.

https://www.mytechshout.com/how-to-get-facebook-api-key.html

You can refer to this document to find out more about what it is – https://developers.facebook.com/docs/getting-started/graphapi/

https://en.wikipedia.org/wiki/Social_graph#Open_Graph