An RSS reader (also called an “RSS aggregator”) is software that collects and displays RSS feeds. Many different RSS readers are available as web-based applications and software that you can download. 

RSS solves a problem for people who regularly use the web. It allows you to easily stay informed by retrieving the latest content from the sites you are interested in. You save time by not visiting each site individually. Instead, you can view all new articles in one place using an RSS reader. When you subscribe to a website or podcast using an RSS reader, you essentially subscribe to the content published on that site. The RSS reader will then check the site periodically for new content and display any recent articles or episodes published since you last checked.