What are App Domains in Facebook Apps?

Question

I want to add the ability to \'login with Facebook\' to my site. But I am confused when I register my site in Facebook Apps. What should I input into App Domains

Answer 1

it stands for your website where your app is running on. like you have made an app www.xyz.pqr then you will type this www.xyz.pqr in App domain the site where your app is running on should be secure and valid