FN is a web annotation tool that allows users to annotate specific text, elements, or pages on websites and share them with others. Recipients can see the shared data in context and discuss or rate the information. FN helps narrow relevant data across sites by involving user feedback, discussions, and perspectives to identify accurate information on a topic. It allows users to annotate specific data on a page rather than the full page, store annotations in the cloud, and see other users' feedback and analytics on which data is most beneficial.