Locking tokens in QuipuSwap to provide liquidity allows you to passively earn both trading and baking rewards. Baking rewards are distributed monthly in proportion to your share and the time you've been holding it. You can read on it further here.
The overall reward volume you have accumulated so far can be checked in the Voting section.
The reward can be withdrawn by tapping the Claim Reward button. You will be redirected to your chosen wallet interface and asked to confirm the transaction.
Voila! The rewards are now sent to your account!