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Level 1How Bittensor works10 lessons
Subnets, the people in them, and the chain that pays them.
Level 2Your wallet9 lessons
The keys that own your TAO, and how to keep them safe.
Level 3Staking8 lessons
Backing a validator with your TAO, and what it earns.
Level 4Subnets5 lessons
Who runs a subnet, who joins it, and how ownership can change.
Level 5Emissions7 lessons
Where new tokens come from, and who receives them.
Level 6Subnet lifecycle4 lessons
How subnets start, how they end, and what it means for the people holding their alpha.
Level 7Root4 lessons
How staking on root earns, since Root Reborn.
Level 8How rewards are decided5 lessons
How validators' scores turn into payments.
Level 9Validators5 lessons
What validators do, how they qualify, and what to look at when choosing one to stake with.

Weights

Validators score miners by setting weights. A weight is a number a validator gives each miner, showing how much of the reward it thinks that miner deserves.

Each validator's weights are scaled so they add up to the same total. What matters is how a validator splits its judgement between miners, not how large its numbers are.

Not every validator can set weights. Each epoch, only the validators with the most stake behind them, up to 128 per subnet by default, hold a permit to do so.

A validator's weights are its scorecard. The chain combines everyone's scorecards to decide who gets paid.