RSS is an XML formatted file that usually contains a syndicated stream of content from a website, blog or other web-based publication. RSS is loosely similar to email, but RSS feeds are not "sent" directly to any specific person, instead each person requests the feed content on demand.
To read an RSS feed, you need an RSS reader, which can be a standalone program or a plug-in integrated into your web browser, email client or other software. Some websites, such as Google, also provide RSS components to allow you to read feeds as part of your personalized home page. I use a RSS Bandit, which is a free, .Net based reader that you can download from http://www.rssbandit.org
You can also view the structure of any RSS feed inside your web browser by simply entering the RSS feed`s URL. For example, try this link: http://turnleft.inetsolution.com/index.xml. You can also checkout more examples at: http://news.yahoo.com/rss