Explain your viewers - Know who your target market is and build personas to pin down their discomfort factors. Don’t test to focus on All people!????? ??? ????? ?? ?????????, ???? ?????? ???????? ????????? ???????, ?????????? ??? ??????? ??????????.?? ??????????? ?????? ??? ??????? ???????? ??????????? ???????? ???? ???? ??? ??? ?????? ???????? ?