An RSS Feed Reader is a tool that allows users to subscribe to and aggregate content from various websites in one place. It uses the RSS (Really Simple Syndication) format, which enables websites to publish updates, such as news articles or blog posts, in a standardized way. Users can easily access the latest content without having to visit each site individually. These readers can be web-based or available as applications on devices. Popular examples include Feedly and Inoreader. By organizing feeds, an RSS Feed Reader helps users stay informed about their favorite topics efficiently and conveniently.