i still don't understand what KPIs are, and now i have no clue what OKRs are. thanks a lot. why do so many people think that acronyms used in their bubble will

i still don't understand what KPIs are, and now i have no clue what OKRs are. thanks a lot. why do so many people think that acronyms used in their bubble will be understood more widely. take IC for instance.