APR stands for Annual Percentage Rate, which represents the estimated annualized reward rate you receive when staking with a validator. However, APR is not a fixed rate and can fluctuate based on several factors, including the number of nodes, service fees, the amount of assets in the smart contract, the network's conditions, and the validator's uptime rank. As more users begin staking, the APR typically decreases.
APY stands for Annual Percentage Yield and reflects the estimated annualized reward rate, factoring in compounding effect. To understand APY, it's essential to grasp the concept of compounding effect, which are rewards generated on both the initial staked amount and the previously accrued rewards. Essentially, APY provides a more comprehensive view of potential staking rewards by accounting for the effect of compounding over time..