TechCrunch

700 million people use the Facebook News Feed every day but many don’t understand how it decides what appears, so Facebook announced today it will start publishing blog updates on how the feed algorithm is changing similar to how Google does. Facebook’s first post will be about “Story Bumping”, which pushes stories you haven’t seen above ones you have.

The News Feed team’s Lars Backstrom says that “News feed is one of only places where Facebook is doing things on the scale of complexity of what Google is doing or Bing is doing in search.” But in some ways its a harder problem because relevance is subjective. Google can show a bunch of people a set of ranked search results and ask if they’re accurate, but the only person who can tell if your feed is relevant is you.

In its early days, the News Feed “algorithm” was really just…

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