In order for PUSHR to serve your content you need to replace the links in your website, service or app with the unique URL generated for you. This URL is different for every CDN zone that you create.
You can brand your CDN URL for a more professional look. To do this you need to create a CNAME record with your DNS provider, and point this record to the CDN URL.
http://cdn.mywebsite.com/ will resolve to
Instructions on how to add a CNAME should be available on your DNS provider's website.