Backdrop is very similar to version 7 of the Drupal CMS, maintaining most of the same functionality and features. The project's mission is to "enable people to build highly customized websites affordably, through collaboration and open source software". Backdrop can be used to create almost any type of websites. Use Backdrop CMS for everything from a single-administrator's personal blog site, to a complex, multi-role, business e-commerce platform. Backdrop is the perfect fit for comprehensive non-profit, educational, government or corporate websites. Backdrop's core is packed full of common features that should benefit at least 80% of all websites. Backdrop's world of Add-Ons can be used to meet less common requirements. Backdrop can be easily extended with the addition of modules (that change the way it works), themes (that change the way it looks), and layouts (that change where content can be placed on a page).