Once you have created your site in Joomla the next important task on hand is to improve its Google Rank or in simple words increase the visibility of the website. Most of the traffic to your Joomla site would come via the web portal and hence you need to optimize the site to have maximum impact on your customers and visitors.
for more info -http://goarticles.com/article/How-to-Improve-Your-Google-Rank-With-Joomla/7827315