Omg Advertising Company is 4a.

Yes, OMG is one of the four major advertising media groups, mainly focusing on 4A media, and BBDODDB is a brother company, both of which belong to HarmonyOS Group. 4a originated in the United States, and international influential advertising companies, such as Ogilvy & Mather, OMG, Zhiwei Thomson, Jingxin, McCann, Dentsu, Yang Dian, BBDO and Li Daiai, are all judged by 4A.