Wednesday, January 23, 2008

Digg: New Algorithm Changes By Kevin Rose

Just wanted to give everyone some insight into some of the changes we’ve been making this week. As we’ve talked about in the past, Digg’s promotional algorithm ensures that the most popular content dugg by a diverse, unique group of diggers reaches the home page. Our goal is to give each person a fair chance of getting their submission promoted to the home page. Since Digg began more than three years ago, we’ve constantly been making tweaks to the promotional algorithm and will continue to do so. Most of our additions go unnoticed, and others take a few days to normalize as we watch them run live on the site. We spend a lot of time analyzing the data and improving the system.

As we point out in our FAQ, occasionally you will see stories in the upcoming section with 100+ Diggs - this is evidence of our promotion algorithm hard at work. One of the keys to getting a story promoted is diversity in Digging activity. When the algorithm gets the diversity it needs, it will promote a story from the Upcoming section to the home page. This way, the system knows a large variety of people will be into the story.

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