I am told that Ehrenfest's theorem appplioed to a physical observable represented by $\hat A$ is:

$\frac{d<\hat A>}{dt}= \frac{i}{\bar h}\langle[\hat H,\hat A]\rangle$

I don't understand how to use this equation or what it means intuitively.

Thanks in advance.

I am told that Ehrenfest's theorem, applied to a physical observable $\hat A$, is: $$\frac{d\langle\hat A\rangle}{dt}= \frac{i}{\bar h}\langle[\hat H,\hat A]\rangle$$ I don't understand how to use this equation or what it means intuitively.