What is an address that tells the browser where to locate the page?

When you type the web address in browser, your computer connects to the DNS server in your ISP provider location, The DNS server in ISP tries to locate the IP address of the web page you requested. If it fails, then the request is forward to another DNS server until the IP address is resolved by one of the DNS server.

Once IP address is located, browser contacts the web server using the IP and request for the resource.