what is this RSS feed

the answers here are good info. now I have this P990 device and it supports RSS function. do I add it like a website bookmark? or do I download something from the website with RSS? what does it look like?

RSS is a family of XML file formats for web syndication used by news websites and weblogs. They are used to provide items containing short descriptions of web content together with a link to the full version of the content. This information is delivered as an XML file called RSS feed, webfeed, RSS stream, or RSS channel.