The RSS feed is an export format you can use to subscribe (or to let other people subscribe) to changes in data on a particular view. The feed will be updated every time any data changes.
RSS feeds can be added to newsreader applications and browsers that support RSS including Firefox, NewsGator, NetNewsWire. You can also use it in services like Google Reader and Bloglines.
The RSS feed is only available for permanent exports from saved views.
If you want any export to be available to someone (or to a service like Google Calendar) without a Dabble account, you need to ensure that you have enabled Allow public access to exports in the Sharing preferences for the application.
Note: Dabble does not generate Atom feeds at this time.