It is less versatile than the Web for displaying online viewable information, and is less efficient than FTP for file transfer. It is gradually getting phased out, but there is still lots of information available only via gopher. Finger generally makes it possible to check on when a specific person was last logged on to a specific machine. It is not implemented everywhere, but has been made to do some pretty interesting things. The most popular browser is Netscape, but there are several others available.
Most browsers offer similar interfaces.
Note though that clicking on a link to a later section of the current document before that section has loaded will produce unpredictable results. Most browsers support FTP in addition to ordinary WWW files, and often underlined items will actually be FTP resources rather than ordinary WWW resources. How-To for information on how to use these important features on your browser. The World Wide Web contains information on almost every topic imaginable. The usual problem is finding it.