RSS (Really Simple Syndication) allows users to subscribe to frequently updated content like news websites, blogs, and library resources. When new content is added, it is automatically sent to the user's RSS reader so they don't need to manually check pages for updates. Libraries are using RSS feeds to notify patrons of new databases, resources, and services. Library 2.0 refers to applying Web 2.0 technologies like social media, user-generated content, and collaboration to libraries to make them more interactive.