How to Joomla! - Joomla! tutorials and extensions
In Joomla!, Menus and Menu Items provide the overall structure for the site. One Menu normally contains multiple Menu Items. Each Menu Item loads a pre-defined type of page determined by the Menu Item Type.
Control panel is a home page of Joomla! Administrator, where you can manage your site such as configuration settings, installing extensions (Component, Module, Plugin), create or edit the menus, the sections, the categories, the articles,...
Articles in Joomla! are organized into Sections and Categories. Categories are the second level of organization underneath Sections. Every Section contains one or more Categories. The special Section Uncategorized has a special Category also called Uncategorized. These are built into Joomla!
This is where you create new Modules or edit existing Modules. This screen has two links in the upper left: Site and Administrator. The Site link is selected by default. The Site link allows you to work with Modules that will be visible on your web site's Front-end. This is where you will place most of your Modules.
Articles in Joomla! are organized into Sections and Categories. Sections are the top-level of organization and Categories go under Sections. The Section Manager is the place where you can edit existing Sections and create new ones.
These are recommended settings for PHP in order to ensure full compatibility with Joomla! Joomla! will still work even if your settings do not match. However, this may affect operation of other extensions of Joomla!