Before you ask, try searching for the answer. Its the only way you learn. Use Google.com, its their for a reason
Social bookmarking is linking your website to many sites used for information that is shared around many blogs. Its very good to use to promote yoursite and help build your backlinks and getting traffic to your site. I agree with anand2027 try searching on google
Bookmarking your favorite pages on sites [ Delicious, Google Bookmarks,Faves etc].In SEO point of view,Social Bookmarking is one way of getting back links for a website.
Most of Your answers could be found in forum discussions than in wikipedia or sth else... To search for any such topic search for: "social bookmarking" inurl:forum. U cud get a real n practical definition n discussion !
Its a same as bookmarking feature in your browser...its used to store good links in to your social bookmarking websites. this website will allow you to access your bookmark anywhere in the world so. you can have all your bookmarks at any time. social bookmarking sites has very large traffic and they give good links too. so...now days for seo purpose this social bookmarking sites are very useful. thanks
Look to be honest I just sat through a talk with Linkedin last week at TFM&A and I asked a very important question, why are we all using social sites like twitter etc... Are we all on there because everyone else is on there and we are all just on there wondering the same thing. The answer to that is YES except for a really small minority of avid social users. The answer I got from them did not answer the question, but I think that would be because I hit the question right on the money. So in Sujash's defence, I spent hours and hours trying to work out the point of it all, and there is very little point from a business branding exercise, but just another way to try and get random traffic to your site from people that have little better to do than spend their time social networking online. Digg etc bring lots of traffic to your site but its notoriously traffic that bounces and just brings your server down Links from some bookmarking sites are nofollow and are used to spam google for SERPS rankings. So if you need to get ranking higher, you could list your links on them for example Spurl.net. Your better of making a great product and getting it out to the press in my opinion.