What is
Information Gain
What your source adds that the pool does not already contain. Repeat what is known and you earn nothing, because the engine already has it a thousand times over. Original statistics, your own expert commentary, a chart with a description a machine can read: that is what registers. In practice, optimising for it means packing your source with facts nobody else has.
Search is knowledge synthesis now.
…the full content anyway. Bring something the pool doesn't have. Engines prioritize information gain: your own statistics, your own expert commentary, your own charts. Repeating what's already known adds nothing, so it earns nothing. Density of unique facts is the metric.…