In this tutorial, I will describe the steps necessary to get an Facebook App ID for your site.

Step 1 Log in to Facebook and then visit the URL facebook.com/developers

Step 2 Navigate to Apps menu and click Create New App

Give you application an “App Display Name” (the name displayed to users).
Namespace is not necessary.

Step 3 Click "Create App" to save and you'll be redirected automatically to your App Dashboard.

Step 4 From your App dashboard, select Settings and click +Add Platform.

Step 5 Fill in your website URL, click the “Save Changes” button and you’re done!

Step 6 Make sure to set your App to Live bu going to Status and Review tab

Step 7 Copy the APP ID and Go to jApps >> Tools >> Credentials

Click New button to create a credential and select Facebook.