Your RSS Feed is sometimes the only way your visitors experience what you have to offer on a regular basis.
It serves to inform and entertain, but is also an essential tool for driving traffic back to your website and improving your overall search-engine ranking.
If all your feed does is show a poorly formatted excerpt of your posts, the hundreds of visitors who are not hitting your main site everyday will have no reason to read your content or share it with others.
When optimizing your RSS Feed, you have to consider the kind of content you curate. There are several reasons why you may want to use your feed to generate clicks. You may have a product, feature or art-directed element to your full site that needs exposure, or your content may be largely image-driven...
Via Martin Gysler