Let us emphasize at the start that Web Browsers are for
exploring. If you are not sure what a button does, try it
and see what happens! As we will discuss in more detail
while we go along, you are unlikely to damage anything by
pushing buttons on the browser to see what happens, and
there are simple ways to recover if you don't like what
happens when you push a button.
The key to navigation of the World Wide Web with browsers
is the Uniform Resource Locator (URL), which gives the address
of a document, not only with respect to a local computer,
but with respect to the entire Internet.