The next bits of information designate where in cyberspace a particular server is located. The part of the domain name after the period is a designation for the nature of the domain. After the slash, directory information appears. It can be the case that there are several directory listings, depending on the location of the file you are viewing in the site's overall file structure. So, the go to bar lists the URL of the current document.
Many people find it helpful to see where they are in cyberspace.
The go to bar can also act as a place in which to enter URLs to go to other web pages. Netscape has some nice features in this regard. Netscape assumes, unless otherwise indicated, that the user is interested in calling up a web page. After a moment, you will jump to Netscape's site. Use the back button on your browser to return to this page.