RSS stands for many of the same things:
•Really Simple Syndication
•Rich Site Summary (RSS 0.91)
•Real-time Simple Syndication (RSS 2.0)
While they all have different names, they all serve the same purpose.
An RSS feed allows your audience to “subscribe” or keep tabs on whenever you update the content on your site. That means every time you hit publish, the RSS captures your update and distributes to anyone who’s subscribed.