What is an upgrade?
Upgrading your site ensures that you’re always running the most current version of Joomla out there.
Clients will periodically ask if they should upgrade their Joomla 1.0, or 1.5 site to a 2.5 site, or if we can do the upgrade for them. The amount of time and energy involved in an upgrade like this can vary greatly from one site to another. This article contains some things you will want to consider when determining how to proceed with an upgrade.