RSS feed can be used to automatically import content for your email newsletter, saving you from copying or re-writing items. RSS Campaign takes content from your blog (or any RSS feed), and sends it as an email newsletter to your subscribers automatically. An RSS feed is a simple data file which contains some or all of your website updates. People can subscribe to your RSS feed using a feed reader and be automatically notified when your website is updated. Most content management systems automatically create RSS feeds for you, so you may have an RSS feed even if you never set it up deliberately.