Your Facebook ID is the Facebook account ID that allows you to moderate the comments, if you chose to use Facebook comments.
Get your Facebook Identifier
Click on the arrow in the top right of Facebook.
Select Settings and privacy, then click Settings.
Click Apps and websites in the left menu.
Click View and edit next to an app or game.
Scroll down to LEARN MORE. Your user ID is in the paragraph below.
Entering your Facebook ID
Head over to your website's admin panel: Parameters > Configuration.
Click on the Social Networks tab and paste your ID into the Integration> Facebook ID section.
You now have access to moderate comments posted on your website!