Once the feed is generated there are two options available from the pop up.
Copy link to clipboard option
Click the Copy Link to Clipboard button.
Open your preferred rss reader and create a new feed, then paste the link into the url feed, set any preferences you require in the reader - for example, for how often the feed is updated and save.
Download file option
If you want to download the xml file to use in an application, click the Download File button. The file will be downloaded to your computer or device.