What is stochastic interest rate?

Could you please explain what stochastic interest rate is? I'm curious to know how it differs from traditional fixed-rate mechanisms and what impact it might have on financial markets and investments. Could you also elaborate on how stochastic interest rates are determined and how they might fluctuate over time? Additionally, I'm interested in understanding the potential risks and rewards associated with investing in assets that are subject to stochastic interest rates. Thank you for your assistance in clarifying this concept.