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Welcome to Outdoor Advertising Association of Ohio OAAO is Important to Local State Economic Vitality The outdoor advertising industry is important to local and state economic vitality. Outdoor advertising is an 80 million industry in Ohio. It creates jobs employs Ohioans and helps businesses succeed. By generating revenue creating jobs supporting large and small Ohio businesses informing consumers and educating citizens the outdoor advertising industry is the critical link between citizens businesses and government across the state.