hi all easy q ??

It's usually your web documents folder. It is located in /Library/Webserver/. If you want to find it through the finder click on your hard disk, Library and then Webserver.
If you use Terminal.app and more /etc/httpd/httpd.conf and look for "DocumentRoot", the default is something like "/Library/WebServer/Documents/".

However if you want it somewhere else, you can edit the above file to point anywhere you like. "DocumentRoot" can be set to point to a folder in your home directory or on a network mounted volume.