Social book marking helps to endorse a website in most successful manner that has gained immense importance in search engine optimization in recent times. It perks up the page rank as well as draw attention of the potential customers towards the website.

Digg, Del.icio.us, Reddit and Stumble Upon are some of the most famous social book marking sites.  At these websites users can share their favorite websites with general public and can also bookmark them. Subscribers can link their list under tags that will appear as search results in case of someone browsing the internet with terms similar to the tags assigned.

Social book marking is highly beneficial in attracting a large flow of good quality traffic and on the other hand it helps to build highly quality back-links for your website. It also assembles permanent one-way links with high page rank that boost rankings across all major search engines.

At social book marking websites users can rank links by voting for their favorite websites. The popularity of the link increases as most of the people like and vote for your link. Once your link starts gaining popularity even on a single bookmarking site, it will automatically emerge on other sites as well. This phenomenon demonstrates the potential of social bookmarking for search engine optimization.

Social book marking sites has a cutting edge over the automated software like search engine spiders because they are manually operated.  In case of social book marking tag based classification are controlled by users which makes them more genuine and authentic.