For example, with the ALI-USDT LP farming pool, you withdraw all rewards in the "ALI Earned" section, sell 50% of that amount to USDT (you need 50% in ALI and 50% in USDT to add liquidity) and add liquidity for ALI-USDT to receive ALI-USDT LP tokens. After that, you stake all the ALI-USDT LP tokens into the ALI-USDT LP farming pool. That is the "Compound" action we use in our calculation for Yield farming.