Once you purchase a Web hosting plan, RockHoster stores your site on one of our servers and assigns it a unique DNS. The DNS serves as the address that allows people around the world to find and view your website. This unique address is required in order for people to view your site. By purchasing a website hosting package, you're basically buying space on one of our servers. It's similar to the space on a computer's hard drive, but the server allows your website's files to be accessed from anywhere..