https://www.youtube.com/watch?v=h1wWgcEWFVg&feature=emb_logo

Liquidity mining is a community-based, data-driven approach to market making, in which a token issuer or exchange can reward a pool of miners to provide liquidity for a specified token.

You earn rewards by running a market making bot that maintains orders on exchange order books. How much reward you earn depends on:

For more information, please read the whitepaper.