Delicious is a social bookmarking website that allows users to save, organize, and share bookmarks of web pages. Some key features include bookmarklets that allow one-click saving of pages, a clean interface, mobile apps, and the ability to follow other users with similar interests. Delicious helps users organize content they find online, archive information from the internet, discover new sites, and track hot topics through its collective intelligence. It also allows users to keep track of backlinks, connect with others, and share bookmarks publicly or privately.