The directory (in the real filesystem) where your main web pages are found.
An example: If you set document root to
/home/httpd/html
, then accesses to
http://your.webserver.com/index.html
would return the file
/home/httpd/html/index.html
. An access to
http://your.webserver.com/foo/gazonk.gif
would
return /home/httpd/html/foo/gazonk.gif
.