It stands for Really Simple Syndication. Seems simple enough. Heres a great plain english video guide on it from common craft. If you prefer a text based version please check out http://www.whatisrss.com/
frugalist massive does not endorse the google-centric views of the presenter.
Theres a whole host of ways that you can share or subscribe to this blog, just click on those buttons on the top right of the page.