If you have a website, blog, audio/video content, or even photos, you can offer a feed of your content as an option. If you are using a popular blogging platform or publishing tool like TypePad, Wordpress, or Blogger, you likely publish a feed automatically. Even other non-blogging sites like social photo-sharing service Flickr offer feeds of content you produce that others can retrieve. There are also tools on the market that can help transform traditional web content into the right format for distribution.
FeedBurner's services allow publishers who already have a feed to improve their understanding of and relationship with their audience. Once you have a working feed, run it through FeedBurner and realize a whole new set of benefits.