These sites provide you most popular, latest information submitted by other people or if you want to get knowledge on a particular topic so you can get easily such as news, politics, science and technology, sports, economic evaluation and fluctuation, news, bloggings, shopping etc.When a page is bookmarked by many users; it shows its popularity and in this way ranking of search engine websites becomes more easy and simple. If you want to get a best quality search engine; social bookmark also helps you by the search engine spiders which is a great network serving people in contributing informations with others.