Although responsibility for the advertising industry in Korea is currently divided among four government ministries, resulting in insufficient systematic governmental support, the value of the advertising industry as a core sector in the digital age continues to increase. The purpose of this study is to examine the economic effects of enacting the Advertising Industry Promotion Act. To achieve this objective, a real-time Delphi survey was conducted with industry experts. The findings indicate that, if the Advertising Industry Promotion Act is enacted, the production inducement effect is expected to increase by 19.8%, the value-added inducement effect by 25.3%, the employment inducement effect by 10.4%, and total advertising expenditures by 15.9%. These results suggest the need to redefine advertising not merely as a marketing tool, but as a knowledge-based creative industry that generates substantial economic value. The study provides a logical foundation for explaining the anticipated benefits of the enactment of the Advertising Industry Promotion Act.