The secret behind the success of Bran? marketing is trust. ?ube marketing only exists because many people trust key opinion leaders. KOLs make recommendations on their websites, video channels, or in their social statuses.Kol balk?s? ekseriyetle bir ya da her dü kolda, omuzlardan parmaklara kadar rastgele bir yerde meydana mevrut a?r?, hastal?k ve