Liquidity mining rewards is a protocol mechanism where users earn tokens for providing capital to a protocol. Users deposit two tokens as a liquidity pair (e.g., ETH+USDC) into a liquidity pool and receive LP tokens. The protocol distributes governance tokens to these LPs as rewards. Users earn from trading fees (protocol revenue) + token rewards (protocol incentives). Mining programs are designed to bootstrap liquidity and create network effects. DeFi protocols live and die by liquidity. No liquidity = no trading = no value. Liquidity mining is the most effective tool to attract capital. Protocols spending $10M on mining earn billions in total value locked (TVL). Designing optimal mining programs is a specialized skill: wrong incentive design leads to LP drain (everyone leaves when rewards end). Protocol architects and economists who can design sustainable mining programs are in extreme demand and command salaries 50-100k higher than average engineers.