What is PWM signal with very high resolution?

If someone says they are trying to read PWM input with very high resolution(2 ^ 30), I think they meant 2 ^ -30. What does very high resolution mean here? They are trying to read low frequency high resolution signal, what does that mean? I know what PWM signal is and what low frequency is, but please explain high resolution? Maybe provide an exmaple?

Thanks.

We know PWM has constant voltage (0 and +V) and constant FREQUENCY as well. So high resolution means the DUTY CYCLE of the pulse can be changed in very small increments.

Seems pretty high for most applications!

What was it in context with?