With the introduction of Web 2.0, social bookmarking sites created to provide Internet merchants a world of opportunities for link building. Everything a person needs to be done to create a site or profile, and then bookmark bookmarking site.
Consider referring to the traditional way, your bookmarks or mainly as a favorite. You can usually find a site or Web page you want and the website to save for your future use. You may also be missing, the page with your friends, family, colleagues or classmates to share. What were you doing in general, and in some cases, not always click your browser bookmarks or favorites option bookmarking site.
While this is all good, biggest problem bookmark this way is he just bookmark the site on the local computer. You can not share with others. If you want to share these bookmarks with others, you’re almost left with the copy and e-mail, send to whomever you want.
With the introduction of social bookmarking, no need to save the pages locally. You can add your favorite sites on public bookmarking sites like Digg, Delicious, StumbleUpon, Reddit, Mixx, etc. with other favorites. As these pages are public, anyone can access from anywhere. And the beauty of it all is that they are Internet search engines as well.
If search engines find these pages, they read not only the content of these sites and pages, but also the links on these pages and index the pages they are displayed. The people of link building are now interested in the idea that this method will now be used for link building.