This document discusses RSS (Really Simple Syndication), which allows users to subscribe to websites and receive automatic updates when new content is published. RSS works by allowing users to subscribe to feeds from websites and blogs using an RSS reader, which aggregates all subscribed content into one place. This saves users time from having to manually visit each site to check for updates and protects privacy by receiving updates through the reader rather than personal emails. Examples of RSS readers that can be used include Yahoo FeedReader, Google RSSowl, and NetNewsWire. The document demonstrates subscribing to CNN using FeedReader to receive new article updates.