This tag is for questions related to the Administrator application (backend) of a Joomla site. The administrator site can be reached through the URL http://example.com/administrator.
The Administrator application, also known as the Back-end, Admin Panel or Control Panel, is the interface where administrators and other site officials with appropriate privileges can manipulate the look of a Joomla! powered web site.
There are many tasks which can be done with the administrator interface. You can set up how your web site looks with the Template Manager or completely change a web site's look by changing the template to another template.
You can also add new extensions such as components, languages, modules, and plugins.
The default login url for the Admin Site is:
Joomla Administrator's Documentation