RSS (which stands for either “Rich Site Summary” or “Really Simple Syndication”, depending on with whom you are speaking) can be thought of as software running on a website that takes new content that is posted to the site, and makes either a summary of the content, or all of the content, accessible to another companion piece of software, known as an RSS reader. The RSS reader is what the end-user runs. The RSS software creates a “feed” (an RSS feed), and the RSS reader polls the feed every so often to see if there is new content to fetch. RSS feeds are accessible by URLs, just like a website, and in fact the majority of sites with RSS feeds have the feeds set-up to be at their main web address, with “/feed” appended at the end.