Who has not heard of Twitter, Digg or Yahoo!? Buzz? These are very popular sites visited by millions of people on a daily basis. Entering the domain of one these websites alone can take you to another domain that is related to your search. They also make known to you other sites that may be relevant to your taste. Those sites I am talking about utilize social bookmarking.
Social bookmarking allows website administrators to save and store web pages in one location. People who frequent social networking sites may be redirected to other sites through the social bookmarking system. Because social bookmarking sites are very popular, website administrators can promote their site here and drive traffic to their domain, and it may also provide backlinks.
Social bookmarking is done by human beings. It is based on the tags that people make on their posts and website content. With the social bookmarking, people who surf the net is more or less redirected to a resource that is indeed relevant to their endeavor.
Twitter, Digg and Yahoo! Buzz is just some of the more popular social bookmarking sites. The internet is loaded with a lot of these sites that may just be relevant to your purpose. Here are some of the most popular and frequently visited social bookmarking sites:
1. Twitter
This site allows users to send on red messages known as “tweets.” Users all over the world can discover and share what’s hot and what’s not. At Twitter, you can find not only news, self-promotion, conversations, pass-along value, spam and even just pointless thoughts and rants.
760,750,806 – Inbound Links
23,579,044 – Compete Monthly Visitors
28,000,000 – Quantcast Monthly Visitors
13 – Alexa Ranking
2. Digg.com
Wherever you are in the world, with Digg you can share web content and discover new ones. Posts are submitted by users on a daily basis and users get to vote the ones that they find best. In this way, the posts with the highest votes, the most “Dugg” ones come at the forefront of the site while the more obscure posts that got lesser votes are “buried” down on the line.
383,598,000 – Inbound Links
33,433,760 – Compete Monthly Visitors
11,400,000 – Quantcast Monthly Visitors
183 Alexa ranking
3. Yahoo! Buzz
This site buzzes you with the latest news, breaking stories, popular blog posts and videos on the web. This site is community-based, which means it is the people who create the buzz. Popular stories, links and posts are get all the buzz and makes out at the top of the page. 
20,031,000 – Inbound Links
8,119,906 – Compete Monthly Visitors
3,600,000 – Quantcast Monthly Visitors
NA – Alexa Ranking.
4. Tweetmeme.com
This site is made up of the hottest links found on tweeter and groups them into categories. This makes navigating through the mountain of tweets a whole lot easier for you to find whatever it is that you are looking for. The categories are labeled as Categories, Subcategories and Channels.
422,863 – Inbound Links
18,244,542 – Compete Monthly Visitors
2,300,000 – Quantcast Monthly Visitors
1,898 – Alexa Ranking.
5. StumbleUpon.com
StumbleUpon allows users to share great websites from recommendations of other users. It also allows you to discover other websites as you click the “Stumble” button. That will redirect you to a myriad of relevant web pages that are complimentary to your preferences. The site chooses which Web page to display based on the user’s ratings of previous pages, ratings by his/her friends, and by the ratings of users with similar interests.
234,000,000 – Inbound Links
4,418,609 – Compete Monthly Visitors
1,100,000 – Quantcast Monthly Visitors
362 – Alexa Ranking.
6. Reddit.com
Basically, reddit.com is a community centered website that allows users to provide content while others can decide by voting if the post is good or just junk. This is where the newest and the most popular source of posts are found in the web.
161,685,000 – Inbound Links
4,908,990 – Compete Monthly Visitors
1,300,000 – Quantcast Monthly Visitors
441 – Alexa Ranking.
7. Technorati.com
Technorati is a gift to bloggers. Technorati was founded as the very first blog search engine. It greatly helped bloggers in collecting, highlighting, and distributing the online conversations globally. Now, Technorati has expanded to a full service media company providing blog and social media site services and connecting them to advertisers who want to join the conversation, and whose properties online introduce blog contents to millions of consumers.
175,287,000 – Inbound Links
3,309,174 – Compete Monthly Visitors
2,000,000 – Quantcast Monthly Visitors
662 – Alexa Ranking.
8. Del.icio.us
Del.icio.us holds the record of having the biggest collection of bookmarks in the universe, with over 150 million bookmarks and more than 5 million users it is really one of the top social bookmarking websites. It was founded by Joshua Schachter in 2003 and in 2005 it was acquired by Yahoo!
427,665,000 – Inbound Links
1,623,083 – Compete Monthly Visitors
317,000 – Quantcast Monthly Visitors
2,476 – Alexa Ranking.
9. kaboodle.com
Love shopping? Then Kaboodle is the place to be, it is a social shopping community where online shoppers share and recommend products. Kaboodle has a powerful shopping tool which allows people to use their lists to organize their shopping, discover new things from people using similar style, and get discounts and best price offers on new products. Kaboodle is a community that allows members to create and join groups to share insights, feedback and product suggestions.
2,600,000 – Inbound Links
3,941,212 – Compete Monthly Visitors
2,500,000 – Quantcast Monthly Visitors
1,694 – Alexa Ranking.
10. Mixx.com
Mixx.com posts top rated contents that have been chosen by you and the people who share the same passion as you. All you have to do is create your own version of the web and mix.com will do the tailoring of the content categories, tags, specific users and groups.
16,005,000 – Inbound Links
879,108 – Compete Monthly Visitors
2,200,000 – Quantcast Monthly Visitors
645 – Alexa Ranking.
11. Propeller.com
If you want to be updated with social news then be a part of propeller.com. Propeller is a social news portal where you and the other member’s post stories from traditional media like magazines and news papers and some of this stories pop-up in the mainstream which will nudge some stories into the limelight.
5,725,000 – Inbound Links
1,164,549 – Compete Monthly Visitors
624,000 – Quantcast Monthly Visitors
1,801 – Alexa Ranking.
12. Newsvine.com
Newsvine is a collaborative journalism website which is powered by the users themselves. Users write and send links to external content, and discuss news items among the users and professional journalists. The Newsvine is not a news bureau and does not exercise any editorial voice; it just acts as a social news platform for the community.
71,708,775 – Inbound Links
1,142,779 – Compete Monthly Visitors
1,300,000 – Quantcast Monthly Visitors
5,545 – Alexa Ranking.
13. Fark.com
Fark.com is a social community website that allows users to comment on daily load of news and other articles from different sources in the web, now the website posts about 2000 links per day and has more than 4 million unique users per month.
36,162,723 – Inbound Links
652,762 – Compete Monthly Visitors
1,300,000 – Quantcast Monthly Visitors
4,119 – Alexa Ranking.
14. Slashdot.org
News for Nerds. Stuff that Matters is the main catch of this technology oriented website. This website is very informative especially for those science inclined people who loves to learn the new advancements in science and be updated with all the science stuff. If you are a geek, then this is a website to be part of.
37,566,035 – Inbound Links
862,416 – Compete Monthly Visitors
404,000 – Quantcast Monthly Visitors
970 – Alexa Ranking.
15. Twine.com
If you want to be who you want to be, then be a part of twine. This website organizes posts according to topic allowing users to browse through topics with ease. This website also has a very smart way of keeping track of things that interests you.
343,090 – Inbound Links
1,062,304 – Compete Monthly Visitors
188,000 – Quantcast Monthly Visitors
19,592 – Alexa Ranking.
16. Clipmarks.com
If you want to know the new stuff on the net that people already discovered then be a part of clipmark.com, a website that posts the peoples thoughts and new discovery in the web.
461,141 – Inbound Links
379,354 – Compete Monthly Visitors
507,000 – Quantcast Monthly Visitors
6,330 – Alexa Ranking.
17. Dzone.com
Hate link sharing sites that ask for payments for putting-up your posts? Then dzone.com is the answer, it is a free link sharing website that is open for everyone and can be viewed by anyone, so just share and share, it’s for free.
3,867,009 – Inbound Links
281,098 – Compete Monthly Visitors
208,000 – Quantcast Monthly Visitors
7,002 – Alexa Ranking.
18. Faves.com
Faves.com is a social bookmarking network that delivers recommendations to each user’s topics and people of interest. It is a free website that allows users to post comments to topics that they are inclined to.
1,437,453 – Inbound Links
159,051 – Compete Monthly Visitors
244,000 – Quantcast Monthly Visitors
6,198 – Alexa Ranking.
19. Blinklist.com
For those forgetful and very busy people, blinklist.com is a good website to be part of since it can save and remember those links and websites that you want to visit.
51,912,576 – Inbound Links
86,650 – Compete Monthly Visitors
44,000 – Quantcast Monthly Visitors
10,985 – Alexa Ranking.
20. Diigo.com
Daiigo.com is an add-on to browsers that really improves your research productivity. It has highlighter and sticky notes aside from just bookmarking that increase your productivity.
8,933,453 – Inbound Links
146,144 – Compete Monthly Visitors
30,000 – Quantcast Monthly Visitors
7,569 – Alexa Ranking.