This document provides an introduction to RSS (Really Simple Syndication) and RSS aggregators. It begins by explaining the fundamental problem with the traditional web and hyperlinks, which is that users must manually check websites for updates. RSS addresses this by allowing websites to syndicate updates through feeds that users can subscribe to using an RSS aggregator. This aggregates updates from multiple sites in one place and alerts users to new content. The document then provides tips on using RSS aggregators effectively, such as organizing subscriptions into folders, adopting different reading modes, and archiving important posts offline.