WordPress is an open-source content management system (CMS) that can be used to create websites and blogs without coding knowledge. It allows users to create, edit, and manage website content through an intuitive dashboard. The dashboard is the central interface in WordPress and contains components for managing posts, pages, media, comments, plugins, users, and settings. Some key advantages of WordPress include its ease of use, wide range of customization options through themes and plugins, and large user community.