The document discusses different types of content that can be shared online, including text, audio, video, maps, bookmarks, photos, events, presentations, reviews, and RSS feeds. It provides examples of sharing maps using Google Maps and sharing photos using Flickr. Flickr allows users to upload photos, add tags and descriptions, organize photos, and control access. Delicious allows bookmark sharing and tagging. SlideShare allows sharing presentations. Content on the web brings features like linking to creators, public sharing, tagging for classification and retrieval, and notifications via RSS feeds.