We just launched your Website. Why can’t you see it yet? The answer: Domain propagation.

Domain propagation is the process of your registrar handing off the changes of your domain to root DNS servers, ISPs acquire records from the root servers, ISPs to other ISPs and so on until you see the changes reflect on your computer with your internet service provider. Some service providers update their records more often than others and receive changes faster. As a result of this, often you will not be able to get to your website by its’ domain name, while a friend can. Once the changes propagate to your ISP, your new Website will be available to you (and other users of your ISP).

Reposting technical description of domain propagation from: http://www.ultrawebsitehosting.com/glossary/what-is-domain-propagation.php