What We Know About Using Non-Engagement Signals in Content Ranking

Understand

Many online platforms predominantly rank items by predicted user engagement.

• We believe that there is much unrealized potential in including non-engagement signals, which can improve outcomes both for platforms and for society as a whole.
• Based on a daylong workshop with experts from industry and academia, we formulate a series of propositions and document each as best we can from public evidence, including quantitative results where possible.
• There is strong evidence that ranking by predicted engagement is effective in increasing user retention.