The document provides instructions for installing Joomla! CMS on a local host. It first explains what a local host is and recommends installing XAMPP, which bundles Apache, PHP and MySQL. It then guides the reader to download Joomla!, extract the files into an htdocs folder, and run the Joomla! installation through a web browser. The installation process involves selecting a language, passing a pre-installation check, accepting the license terms, and configuring the database connection.