Group items tagged

"Social bookmarking is a centralized online service which allows users to add, annotate, edit, and share bookmarks of web documents.[1][2] Many online bookmark management services have launched since 1996; Delicious, founded in 2003, popularized the terms "social bookmarking" and "tagging". Tagging is a significant feature of social bookmarking systems, allowing users to organize their bookmarks and develop shared vocabularies known as folksonomies."