Turbo Boost is a feature available on high end intel processors. When a mac is running tasks that are high on processor demand it can boost frequencies to greater levels which results in better performance. However this can cause the CPU to thermally throttle because of accumulated heat, and quick battery drainage. To counteract these disadvantages Turbo Boost can manage between different levels of frequencies and core counts depending on the tasks at hand. All of this is done automatically without the users input. Mac OS 10.15.5 takes full advantage of these functions.