RSS stands for "Rich Site Summary," "RDF Site Summary," or "Really Simple Syndication," according to different sources. Whatever the initials stand for, RSS is a format based on XML (eXtensible Markup Language) that is used for gathering and distributing web content such as news headlines. An RSS feed is simply a file that conforms to RSS format. Many sites now publish RSS news feeds, including major news organizations such as Reuters and the Associated Press.
CERT's Podcast Series: Security for Business Leaders