Many of the times, you want to retain your old website link juice and search engine result positions . In order to do that, you have to create 301 redirects for all of your old links . Joomla 3.0 has simplified the job for you . Now we have a new component under the components section on the Joomla administrator section. It's Redirect Manager .
Before making this website live on this domain, we developed the whole on a different domain. That took around 2 months to develop and during this 2 months, Google had indexed that development website. Now, our primary concern was how to redirect all the development domain links to our main website link, without losing the targeted page traffic.