Mean Reciprocal Rank

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Note

• evaluates how well a system places the first relevant result in a ranked list
  • at which position is the first relevant hit?
• Highlights the importance of quickly surfacing at least one relevant document, with an emphasis on the efficiency of relevance delivery. Matters a lot when there are only a few items we can show to the user at any given time.
• The best business example I can give of MRR is thinking about something like a “play next” button. If you’re building Spotify, you probably don’t really care if one of the next 50 songs might be a banger. If the songs in the queue are not good, users will likely churn. The same applies to YouTube rankings.

Resources

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