Facebook EdgeRank Revealed (2010)
Facebook explained feed ranking: affinity, weight and time decay.
DateApr 2010
PlatformFacebook
TypeAlgorithm
Who it affectsAll pages
What happened
Facebook explained publicly that feed ranking was based on ‘EdgeRank’: affinity (how close you are to the poster), weight (the type of interaction) and time decay. It was later replaced by far more complex machine-learning ranking.
Who it affected
All pages.
What it means for marketers today
The principles (relationships, meaningful interactions and recency) still help explain what reaches people today.
Related
See the full Facebook Algorithm & Feature History (2006–2025)