Employed by Fb to provide a series of ad products and solutions for instance real time bidding from third party advertisers.Used by Fb to deliver a number of advertisement products for instance authentic time bidding from third party advertisers.seven.20€ ???????? ??? ?????? u03a7u0391u03a1u03a4u039fu039au0399u0392u03a9u03a4u0399u0391 u03a3u03a5u