RSS
RSS stands for Really Simple Syndication. It provides an easy way to gather and display information from varied and multiple sources, including news stories, updates to websites, business and stock statistics, and new posts to blogs.
In short, RSS is a timesaver.
To read these feeds, you need a tool called a feed reader or news aggregator. It maintains a list of the web feeds you syndicated, checks them at regular intervals for updates, and displays their contents in a readable format. All feed readers track what you've read previously and highlight new content for easy scanning.