RSS
RSS is a family of web feed formats used to publish frequently updated digital content, such as blogs, news feeds or podcasts.
Users of RSS content use programs called feed ‘readers’ or ‘aggregators’: the user ’subscribes’ to a feed by supplying to their reader a link to the feed; the reader can then check the user’s subscribed feeds to see if any of those feeds have new content since the last time it checked, and if so, retrieve that content and present it to the user.


Squidoo:
Original content is one of the biggest problems that an internet marketer has to deal with. It is important for search engine’s spiders to find fresh content every day, to find new pages added to the client’s site. One of the most complicated tasks today, is to create content that search engines will see — which is becoming more and more difficult as the industry continues to grow.