Definition and example of social bookmarking:

• Bookmarking
• Bookmarks are Web page locations (URLs) that can be retrieved.
• Browsers hold bookmarks

• Social bookmarking
• Sharing bookmarks online
• Extensive use of tagging for purposes of categorization and searching
• "services provide web feeds for their lists of bookmarks, including lists organized by tags." (Wikipedia)
• added extra features such as
• ratings and comments
• import and export from browsers
• emailing
• web annotation, and groups or other social network features

Some services and tools:

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Collaborative tagging (or folksonomy)

• "practice and method of collaboratively creating and managing tags to annotate and categorize content"

• Tagging

• Folksonomy

In this site...

• How to
• Learning experiences