The cookie, set by PubMatic, registers a unique ID that identifies a returning user's gadget across Internet sites that use precisely the same advertisement network. The ID is utilized for focused ads.H? th?ng chiller m?ch n??c four Primary Secondary Stream • T?i m?ch n??c three và 4 thì h? th?ng s? d?ng chiller bi?n t?n ?? ch?y theo nhu c?u t?