Uniform Resource Locator. The URL is the unique address for a file that is accessible on the Internet. To access the home page of a Web site, you can enter the URL of the home page (for example: http://www.webroot.com) in the browser’s address line. You can also access specific files using URLs (for example: ftp://www.webroot.com/sample.txt). The URL contains the name of the protocol to be used to access the file resource, a domain name that identifies a specific computer on the Internet, and a pathname for a specific file.