The addition of Search Friendly (SEF) URLs will add greatly to your site in terms of search engine visibility.
In this tutorial, I show you how to set up one of the most popular SEF extensions for Joomla - sh404SEF.
My favorite SEF extension for Joomla is sh404SEF. I have tried a few other extensions as well, but sh404SEF is the one I'm comfortable with and which best seems to meet my requirements. This tutorial will help you duplicate the setup I use here at Joomlablogger.net.