Social bookmarking allows users to save, tag, and share web links. It discusses the social bookmarking process which involves bookmarking a site, tagging it with a description, and making the bookmarks public. It then provides instructions for getting started with the social bookmarking service del.icio.us, which includes registering for an account, installing bookmark buttons, importing favorites from a browser, and sharing tags on blogs and wikis. Finally, it mentions social bookmarking is an example of a social networking platform on the read/write web.