You have the freedom to create and share network. GNU or GPL intended to guarantee your freedom the versions of programs, so that is will make sure that software if freely to use by others. The free software foundation’s using GNU or General Public Licence (GPL) mostly for the free software, but also for other internet works are applicable. Do you feel your web site is not promoting enough and not helping mush in selling? Perhaps the MySQL and PHP development system needed in your site presented by Joomla. This is like your IT consultant who helps you in designing and makes your website works more effective as the promotion.  

The most common thought about the use of content management system is that: this is the best way in doing business and the best business supporter, content management system is as complex system, and this is not affordable to use. Joomla designed to transform those view on content management system. Joomla is different from the normal system in software portal and this is not that complex to start. Joomla designed to people to use so, it is quite common today. It is licensed under the name of GNU or GPL. GNU or GPL is a free copy licences for software and other type of creations.