Social bookmarking sites allow users to save, "favorite", and organize links to websites they like. These tools take the clunky process of bookmarking a website within a browser a bit further, offering a streamlined interface in the cloud.

While still in use, sites like Delicious and StumbleUpon represent an older, more static way of using the Internet that doesn't take social interaction much into account. I checked out my Delicious account for purposes of this story, and realized that I haven't tagged, shared, or added anything since 2008.

Bookmarking Sites Thrive That Use Social Interaction Well

Two bookmarking sites that do social interaction well are Reddit and Slashdot. Both can arguably be called news aggregator sites with a high degree of social interaction, rather than pure social bookmarking sites.

Slashdot, one of the first, has a devoted community that sticks with the site through thick and thin. In the cowboy days of search engine optimization (SEO), a decent mention on Slashdot meant that your website had been "Slashdotted", and a guaranteed bump in traffic in rankings soon followed. The community on Slashdot is tech-heavy and fact-driven.