Traffic from StumbleUpon is valuable. In my opinion, more valuable than Drudge taffic. Traffic that is driven to your site from Matt Drudge’s site, is fleeting, because his stories fall into the “immediate” news cycle. You will have a big spike for a day or two, but those folks never seem to return. StumbleUpon, on the other hand, seems to drive more traffic over a longer period with stories that usually have a slightly longer life.
There are other socialized news feeds like fark and Technorati, but I think StumbleUpon is the easiest to just jump on with your normal everyday stories. Take a look at the “buzz” page for StumbleUpon, do you have a story up there?
RM put in nicely at Pick RiteSEO:
As more poeple stumble through your URL, and leave review (icing on cake) your website ranks higher on StubleUpon which gets hits in thousands every day. So the formula is, the more stumbles, the higher the stumble ranks, the quicker SPIDER crawls through your URL.. followed by unique hits by actual visitors.