I have a web page that has several different pages on it. I have seen on tv for example a site that is www.whaterver.com/tv
They don't have the .htm or .html extensions.
When I send someone my site url and I don't want them to have to go through all kinds of steps to get there. I just want them to be able to type www.whatever.com/tv
and not have to deal with all that extra extensions like .htm or .html etc.