WordPress is a free and open source content management system that powers over 60 million websites. It allows users to create and manage blogs or websites through an intuitive dashboard. The document outlines the differences between WordPress.com and WordPress.org, describes the key areas of the WordPress dashboard, and provides guidance on customizing a WordPress site through themes, plugins, widgets, posts, pages, categories, tags, and more. Users are encouraged to stay up to date on WordPress, theme, and plugin updates to ensure their site functions properly. Homework is assigned to get hands-on experience creating pages, posts, categories and using plugins and widgets.