The document discusses tagging and provides an overview of what tagging is, who uses tagging, why we tag, and how to get started with tagging. Tagging allows people to add metadata keywords to items like photos, videos, and blog posts to help with searching and finding items again. Many web applications use tagging, including Flickr, YouTube, and Delicious. Tagging provides benefits like ease of use, personal information management, collaboration and sharing, and fun. The document encourages readers to tag their own content and connect with others using similar tags.