Definition: to have web sites of your choice deliver their latest news directly to your computer. So instead of having to visit 14 different places to get your weather, sports, favorite photos, latest gossip, or latest political debates, you just go to one source and see it combined ("aggregated") into a single view.
How do I use RSS?
To use RSS, you will need a RSS news reader or aggregator that will allow you to collect and display RSS service. RSS news readers allow you to view the service you select all together in the same place and, by automatically retrieving updates, stay current with new content soon after it is published.
Adding the RSS channel to your news reader:
If you click on the RSS button you can subscribe to the feed in various ways, including by dragging the URL of the feed into your news reader or by cutting and pasting the same URL into a new feed in your news reader.