Social bookmarking is useful as a way to access a consolidated set of bookmarks from various computers, organize large numbers of bookmarks, and share bookmarks with contacts. Business bookmarking forms an essential part of off-page SEO. Submitting a link to business directories involve calculation of PA (Page Authority) and DA (Domain Authority) of that site.
As these services have matured and grown more popular, directory submission added extra features such as ratings and comments on bookmarks, the ability to import and export bookmarks from browsers, emailing of bookmarks, web annotation, and groups or other social network features. These are the great business listing, news, social bookmarking and directory submission websites: