Make clear your viewers - Know who your audience is and Make personas to pin down their soreness factors. Don’t try out to target everyone!???? ??????? ????? ?????????? ??? ??????? ???????????, ???? ????????? ???????? ??? “???????” ??? ??????????? ??? ??? ??? ???? ????????? ??? ??????????? ??? ??????, ?????? ??? ????? ??? ???? ???? ???? ????