Digg has a large visitor and can easily drive thousands of visitors to your site in a very short time. If people like a certain post, they will ‘vote’ the post. Top post will be put in front page and this will bring lots of traffic.
If you use wordpress, you can use digg to gain more traffic. First submit your post to digg.com. Then get your digg url by hovering your mouse to your article digg button. Right click the button and click ‘Copy shortcut’ to get the url.
Update your post at wordpress by putting [digg=http://digg.com/url_to_story_on_digg] and it’ll be transformed into a “Digg This” button.