Drupal is a social publishing platform which can be used to develop practically any kind of website. It is relied upon by tens of thousands of users around the world, from individuals to large corporations and government agencies.
It is used to power blogs, corporate portals, intranets, ecommerce sites, personal websites, social networks and more. In fact, there is no limit to what can be built with Drupal.
It is designed to be both light and powerful, and has a core system that manages many routine functions such as user management and permissions, without being overloaded with unnecessary features. It can be extended using modules and themes.
Modules are used to add new functionality or alter the functionality of the core system. There are literally thousands of freely available modules, which can be combined to build complex sites without any coding, or you can build your own modules to add the functionality you need.
Themes give you complete control over the appearance of your site. There are both free and commercially available themes, or like modules, you can develop your own.
All of this is a long way from Drupal’s beginnings, when in 2000 Dries Buytaert built a site that allowed a small group of students to harness the power of the internet to keep in touch. Dries still leads the Drupal the project.