Feed API provides a powerful means of importing feeds from other sites directly into your Drupal site. What if you want to export your feed as an XML file to a content distributor who wants it on his FTP site? There is of course the traditional approach of using curl to read your feed URL and dump the text as files on to the ftp site. There is not much control that you have over this process. However doing this via Drupal Views will give you fine grained control over the process