What does Upgrading a Joomla site Entail?
Upgrading the website involves migrating all your site's content over to the newest Joomla version along with any 3rd party extensions your Joomla site may have. Upgrading also includes migrating the design of your website to keep the same look and feel on the newer version of Joomla. Your website will be Upgraded and tested on a test URL before moving live.