Once the plugin is activated ensure you enable Instant Article generation under the General tab in the Admin menu. It will then auto generate an RSS feed of your articles that can be submitted to Facebook. These are the steps you need to take to get a feed up and running.
- Create a style sheet in Facebook and upload your logo.
- Point Facebook at your Instant Article RSS feed so it can ingest your articles.
- Submit your feed for review.
- Enable caching of the RSS feed.
- Enable 'modified only' in the RSS feed.