Social bookmarking can help your blog's rankings in so many ways. But I have come to believe that so many have tried how to get more Diggs and after doing it wrong have given up.
However, think about this: If Digg has 5 million users and the average number of posts, from the Digg top 100 to the user who no longer participates is 1 post per day, that is 5 million posts.
How can you possibly expect that Google will see your 1 link in Digg in 5 million others as a backlink to your site. In fact if you submit your site to Digg and no one else Diggs it, I have come to feel that is a negative indicator in Google’s eyes. The worst thing you can do is submit your Digg posts yourself and then get no Diggs.
One of my friends on Social Marketing Central wrote an article that went hot on the Internet. He got like 1500 visitors in a few days and 80 comments. The bad news is that he only got 18 Diggs. Now tell me this: Don’t you think that Google, that has access to the popularity of posts on Digg just like we do, would not see 1500 visitors and 18 Diggs a negative indicator of this blog and the blog post itself?
I can easily get 100 to 200 Diggs for any article I want in Digg in 2 days. I do that through my own strategies and participation.
So social bookmarking if done wrong can actually hurt you. Social marketing is about being social, so be social on social bookmarking sites, don’t just submit you own content and expect that this will bring you results.