WordPress is an open source content management system that is used by over 12% of the largest websites. It allows for flexible deployment either through WordPress.com which handles hosting and updates or WordPress.org where users are responsible for installation and management. WordPress 3.0 introduced new features like custom post types and taxonomies as well as built-in support for managing multiple sites. The WordPress community provides extensive documentation, themes, plugins and user groups to help people get started and expand their use of the popular platform.