1) Go to <a target='_blank' href='https://developers.facebook.com/apps?ref=mb'>https://developers.facebook.com/apps?ref=mb</a> and  you'll find the button "Create New App".
You can then register a new application for social media engine plugin.

3) Disable sandbox in basic settings and fill rest with appropriate details.

4) Click on Website with Facebook Login, give link as your seo panel location.

Eg:- http://demo.seopanel.in/

5) Click on permission in setting, give following values

-  User & Friend Permissions => email, public_action 
-  Extended Permissions => public_stream, read_stream, offline_access, status_update
 - Auth Token Parameter => Query String.

Save the details.
