A DIGG circle is a group of people that agree - formally or informally - to digg posts that any member submits to Digg.com.

Digg is a social content site, so whatever stories get attention, get posted to the home page. Stories that are posted to the home page get tons of traffic.

However, there are a plethora of social content sites springing up all the time, so maybe Digg has had it’s day?