The Instant Articles for WP plugin adds support for Instant Articles for Facebook, which is a new way for publishers to distribute fast, interactive stories on Facebook.
The plugin is available for free in wordpress.org repository. You can download it
or install directly from the WP Dashboard › Plugins › Add new panel.
As any other plugin from wordpress.org site, when new version of the plugin is available, you will be notified about it directly in your Dashboard.
After activating the plugin, its configuration page will be accessible in the WP Dashboard main menu. Click the Instant Articles link and follow the setup process.
Send a Post Content To Facebook
When you create a new post or update an existing one, the plugin will try to send its content (converted to meet FB Instant Articles rules) to Facebook automatically.
The result of this action can be checked on a post edition screen, in the Facebook Instant Articles meta box.