RSS (Rich Simple Summary / Really Simple Syndication) is a XML technology that is currently the simplest way to automatically download data from the web. The RSS form of web data contains links, headlines, and news whose broader content you can view if you choose to follow the associated links.
You need to get a program for reading news (News Reader). This program displays information that arrives on your computer via RSS from the sites you have selected. Some of the most famous programs are: Google Reader https://www.google.com/reader, Feed Reader https://www.feedreader.com as well as more popular web browsers that contain an RSS reader.