This simple Joomla facebook Auth simplifies the login formality that is required when a new user visits your site. When a new user wants to be a part of your web site, you would ask him to fill out long forms asking for his name, address, mail id, telephone number, username and so on as per the web site owners wish. And again after this a password would be sent to his email id that has to be again verified to be a part of your web site or to login to your web site. How many of the visitors would vanish seeing your long form? Even if he wishes to log into your web site he wouldn’t after seeing the form.