???????????? 60*40*40?????????????? ???????????? ????????????, ???????????? ??? ???????????, ???????????? ??? ?????????? ??? ???????????.Utilized by Fb to deliver a series of ad goods for instance actual time bidding from 3rd party advertisers.????????????? ???? ??? ?????? ??? ?? ?????? ??? ???????? ?? ????????????? ??? ?????? ??? ???? ??????? ???.