Social Bookmarking

Check out these articles for a better understanding of Social Bookmarking:

• Social Bookmarking - The Ultimate Viral Marketing
  
  Social Bookmarking could be one of the best things that ever happened to websites and blogs. Basically Social Bookmarketing sites allow users to create a set of content bookmarks. These bookmarks are organized by tags, which are (usually) arbitrary words or phrases the user can assign to content.
• How Tagging and Keywords Stack Up
  
  What is tagging? Tags are basically keywords. A tag can be a category or a subject. When we talk about tagging, all we are basically referring to is how you summarize what your webpage or site is about.