Social Bookmarking is a method for internet users to store, organize, search, and manage web pages on the Internet with the help of metadata.in socialbookmarking users save link to wave pages.The bookmarks are usually public but can be saved privately.Shared by a specific group.Social bookmarking is a powerful tool in promoting a website.

Advantages:
social bookmarking sites are attracting a lor of regualar users and high traffic which means that information on them tens to get better positioning on web sites.Furthermore links to your own web site or blog when posted to a social bookmarking site create backlinks to your site.Search engines value inbound links to your site because they are an indication of the popularity of a site increasing your own search engine positioning.
->Enables like-minded people to find each other and create new communities of users around a topic
->allows a specific group of people (staff members in an organization for example) to share resources efficiently
->* Can help you find new insights about a topic by seeing how others think and connect to it
->Creates contextual taxonomies that have meaning for a particular community/group of people (good for different cultural contexts)
->a fast and very effective way to keep track of stuff - this means you are not waiting for the Google spider to visit any longer. You can get a RSS ping as soon as a link is added.

Drawbacks:
->Tools are still evolving and not all have polished,user-friendly interfaces
->o consistent oversight to how a resource is tagged - e.g. tag London could stand for Julie London, City of London, or Jack London
->The stream of specific resources on a topic is as good as the community who has joined the service. Many services are populated with early adoptor types so the technical information can fantastic, but more general topics may not yet have lots of users. This is changing though.
* More overwhelming
* Possibility of tagging spam

Always Remember 3 things
1. Tag your web site, blog, squidoo lenses, social networking sites and any other web presence you have on as many social bookmark sites as you can.

2. Encourage visitors to your sites to add them to their social bookmarks.

3. Network with other social bookmarkers and collaberate with each other to promote your sites.