hello
It is a method for Net Savvies to tag, organize, store, manage, share, and search for bookmarks of resources online. These may include comments, votes for or against something, or tags that collectively.
features
A reasonable amount of users.
A wide ranging documentation, like a good support team
Excellent export and import features
A blog to have latest on new features
A good social bookmarking site ideally should comply with above criteria, based on these features the best social bookmarking tools according to me are as following.