Social bookmarking websites are becoming more and more popular. They allow you to save bookmarks online and tag/categorize them with keywords instead of saving them as bookmarks in the favorite’s list of your browser. They can introduce the sites that you own or you like to others with relevant tastes, can drive traffic to your site, and valuable backlinks.

The following are a few such websites used frequently by internet users. Some social bookmarking sites like Propeller.com pass on link juice, while some use the NoFollow attribute. But do not let the use of NoFollow fool you, the search engines are looking beyond the incoming links from social bookmarking sites to gauge their value to their search indexes.

1. squidoo   Squidoo is a cross between a social networking site and an authority portal. It’s made up of lenses, which are basically content pages prepared on a wide variety of topics by enthusiastic members. Because Squidoo is focused on learning and valuable information, the site tends to attract a higher quality audience compared with traditional social networking sites.

2. Digg   Digg is a technology news website that combines social bookmarking, blogging, RSS, and non-hierarchical editorial control. You Digg a story, others Digg it, the more popular it gets the better chance it has of hitting the first page.

3. del.icio.us    del.icio.us is a social bookmarking site that has rapidly taken off even more in popularity since being purchased by Yahoo. I use del.icio.us probably the most out of all these top picks, particularly to post interesting sites that I’ve found around the Web. I also subscribe to quite a few del.icio.us tags, such as popular and reference, and I get all the sites tagged with these keywords in my RSS reader of choice, bloglines.

4. StumbleUpon   The beauty of StumbleUpon, to my mind: you are able to take advantage of a vast network of dedicated Web searchers who are finding utterly brilliant sites and sharing them with you. I do have to warn you, though – StumbleUpon is an incredibly addicting way to search the Web. I found myself up till 1:30 AM one weekend, blearily clicking the Stumble! Button over and over again, because the quality of the sites are just so amazing; you just keep on coming across stuff that instantly merits a bookmark of your own.

5.  Reddit   Social bookmarking where your votes affect your karma points.

6. Twitter

7. Mixx     Mixx offers up an eclectic mix of all sorts of bookmarkable content; anything from videos to news to popular stories can be found here. Just pick a category and you’ll be able to find lots of stuff that might merit a bookmark of your own.

8. Propeller     The way Propeller works is very similar to other social bookmarking sites such as Digg or del.icio.us. Users find stories, submit them, and other Propeller users can vote and comment on those stories, with the most popular stories rising to the top.

9. Furl    Not only can you do the standard bookmarking and sharing, you can save archived versions of a webpage and even export all your saved pages to a ZIP file.

10. Clickmarks    With Clipmarks, you can clip the best parts of web pages. Whether it’s a paragraph, sentence, image or video, you can capture just the pieces you want without having to bookmark the entire page.