Social Bookmarking

Social bookmarking is an activity performed over a computer network that allows users to save and categorize personal collection of bookmarks and share them with others. Users may also take bookmarks saved by others and add them to their own collection, as well as subscribe to the lists of others - a personal knowledge management tool.

http://en.wikipedia.org/wiki/Social_bookmarking