Adding the App to your own FB Page
From JReviews Documentation
After we finish setting up the first FB App, next we should test the app by adding it to our FB Page.
To do that, go to the Applications page in FB App Factory Add-on and click the Add to FB Page button:
You will be redirected to Facebook and you will be asked to which of your FB Pages do you want to add the app.
When you view the app for the first time, you will be able to adjust the widget settings:
Click Save and View Tab buttons to see the app and the widget inside it:
After you confirm that everything works fine, edit the App in Facebook again and disable the Sandbox Mode so that other people will be able to see it.