Some benefits of using a CDN:

★ Faster Page Loads 
★ Bandwidth Savings
★ Good results even with cheap shared hosting
★ Reduced Server Load
★ Serve More Visitors
★ Better SEO Rankings because Google loves faster sites.

Integrating Joomla! CDN plugin with your website is really easy. You don't need to learn difficult technical things. Just follow the guide at:
http://www.pacecdn.com/services/cdn-for-joomla.html

If any problem, please feel free to contact support.

Thanks for your interest.