The Reader app gives you the ability to have dynamic RSS (Rich Site Summary) feeds on your site.
What is a Feed?
A feed is a web technology that pulls in rapidly or frequently updating information from a web source. The information is often displayed as dynamically changing list. A common type of content used in web feeds are news headlines. New headlines are constantly being created, so this content really lends itself to being displayed as a feed.
The great thing about a feed is that once you set it up, the information will automatically update...