Digg is a user driven social content website. Ok, so what the heck does that mean? Well, everything on digg is submitted by the digg user community (that would be you). After you submit content, other digg users read your submission and digg what they like best. If your story rocks and receives enough diggs, it is promoted to the front page for the millions of digg visitors to see.
What can you do as a digg user? Lots. Every digg user can digg (help promote), bury (help remove spam), and comment on stories… you can even digg and bury comments you like or dislike. Digg also allows you to track your friends’ activity throughout the site — want to share a video or news story with a friend? Digg it!