A URL is the address of a particular site, page, or file on the Web.

A few examples:

* The URL of a site: http://www.xanga.com
* The URL of a page: http://help.xanga.com/gettingstarted.htm
* The URL of a file: http://www.xanga.com/images/xangalogo.gif

A few rules of thumb:

* You'll usually need a site or page URL if you want to link to a page
* You'll want a file URL if you want to remotely link to a background image or music file

Hope that helps!

A bit of trivia: URL stands for "Universal Resource Locator."