Joomla Frontend and Backend
After you have successfully installed your Joomla site on your local computer, you actually have to sites and these are:
Site Frontend (the public site) – it is where your visitor see, interact and navigate with your website. You can access your Joomla Frontend site through http://yoursitename.com
Backend (administration site) Administrator’s Control Panel, where Managers, Administrators, or Super Administrators log in to manage all aspects of the Joomla! web site, including both features and content. You can access your Joomla Frontend site through http://yoursitename.com/administrator.