???? ?????????? ??? ?????????? ? ?????????, ???? ????? ??? ??? ?????? ?????? ? ??????????? ???????? ??? ?????? ????????.?????????? ?????????… ? ????? ?????. ????? ???? ? ??? ?? ??????? ?????? ???? ?????????? ????????; ???????? ????????? ?????????? ????? With this lesson, you'll find out how to track details along with the part that AB tests plays