This is the question the layman asks when he comes across tools like Joomla, Magento and Wordpress, which are used for web development. The answer is simple- simplicity and cost effectiveness. Joomla, Wordpress and Magento are content management systems. Now, what is a content management system (CMS)? A CMS is a platform which manages the content and maintains it in proper running order. It is like a library of books with everything catalogued.