The most popular webserver, by far, is
Apache. There are rpm packages available through YUM, so just search for apache and install the server, if it isn't already installed. Just read a little bit about Apache
here and you should be up and running. Of course you'll probably want to install some extra packages like
PHP and
MySQL. Each of these websites have tutorials for setting them up with Apache, so I should just be a matter of following a tutorial/HOTWO.
Using Apache once it is up and running is as simple as copying the files you want the webserver to broadcast into a the htdocs directory. Then you can access your files through the webserver by pointing your favorite browser to "http://127.0.01/". All of this should be in the Apache documentation though.
Good Luck,
~Justin