AdvertisingFeatured OOH contributes N20billion to ad billing in 2021Emmanuel OgundeleMarch 9, 2022March 9, 2022 by Emmanuel OgundeleMarch 9, 2022March 9, 20220238 Operating firms in Nigeria’s Out – Of- Home (OOH) advertising sector accounted for an estimated sum of about N20 billion in course of the business...