Social bookmarking is an online service that allows online users to share their content with backlinks to their website. There are lot of bookmarking sites from long time. Like- Digg, Delicious are very old site for bookmarking.
The platform Bikre.com provides free social bookmarking services that allow anyone to submit content with a link to their web pages. This platform provides services like- add a link, add a website, submit a URL, free directory, social bookmark.