The AlgoFi Withdrawal Portal allows users to perform withdrawal operations on the AlgoFi protocol. Users can choose a wallet provider and select the V1 Lending Market service. The portal provides information on the total amount, borrowed amount, supply APR, and borrow APR for the Algo market. Users can also withdraw or repay a specific amount or the maximum allowed amount. It is important to repay outstanding borrow positions before withdrawing collateral to avoid transaction failures.