?? ???????? ??????????? (???????) ????? ??? ??? ?? ??? ?????? ???????????????? ????? ???????????.??? ??? ?????????? ??? ??? ?????????? ??? ??? ????????? ??? ????? ??? ??? ???? ????????.Utilized by Fb to deliver a series of ad products for instance real time bidding from third party advertisers.???????????? ???????? ??? ???????? ??? ?????? ?????????