Joomla 3.0 was released in 2012 with subsequent updates in 2013 and 2014, with goals of improved usability, focusing on content, and mobile readiness. The document discusses Joomla versions for new sites, existing 2.5 sites, and older 1.5 sites, encouraging upgrades from 1.5 for security reasons. URLs are provided for demo sites showing Joomla's updated front and back ends.