Vaults are ideal investment vehicles for those looking to earn compound interest. In a vault, users can earn more of the asset they initially stake in it. For example, when a user stakes CAKE in the CAKE vault, the system uses the CAKE staked to farm in the best APR farm such as CAKE-BNB (APR 70%), and CAKE Pool (APR 140%). They will continue to earn more CAKE over time, effectively growing their share in the vault and thus allowing for more and more rewards over time. Each vault can either refer to a single token in a pair invested in liquidity pools, or a single token invested in lending platforms or single stake reward pools.