What Do You Think About Product Managers and Product Analysts?

A product manager would mostly speak to the very clear definition of the target user persona and the user problem. And then the product analyst would be the person who actually translate it into metrics, like measurable definition formulas,. Can you give us examples of those? Like, what is an example of how a product manager might frame a KPI and then how a product analyst would translate it? If you can think of one, I will go pre-general just not to disclose anything, I shouldn't disclose.