The links in your pages are what turn them into hypertext documents, rather than simply text marked up in a strange formatting language. The text you click on to activate the link. This is called the anchor. Though usually you want to link a document to another WWW document, it's possible to link it to any file that can be accessed via the Internet. You have to use them when linking to a file on a different computer.
Relative links use addresses that start from the directory of the current file.
Since you haven't specified a transfer protocol and a computer name, the browser looks for a file on the same computer as the current page. If they're absolute links, you'll have to change every link in every page to the new address. But If your page is long, or contains many separate pieces of information that you want separate access to, you may want to make links to particular items of text within the page. But you can link to any point you like in a WWW page, either from the same page or from a different page. One day soon they'll rewrite that page, and the label will change or disappear, and your link will not work any more, even if the same file still exists on the same computer.