Social bookmarking refers to websites that facilitate discussion and resource sharing within a rigidly tagged & organized taxonomy.
Social bookmarking sites can be used to customize the user’s bookmarks online. It can provide better search engine optimization. It can energize the backlinks of search engines. Marketing contents in bookmarking sites can increase the site traffic.
Pursor.com is a free social bookmarking platform for free to use. Anyone can submit their content with links to this portal. It is a great place to get quality links for your sites which could help you to index your pages for search engines.