This comprehensive review delves into the pivotal role of Computer-Generated Imagery (CGI) in shaping modern advertising campaigns. As the advertising landscape undergoes a digital transformation, CGI emerges as a potent tool for crafting visually stunning and memorable content. This article explores the historical evolution of CGI in advertising, highlighting key milestones and innovations that have reshaped the industry. From its early applications to contemporary advancements, CGI's influence on storytelling, brand identity, and consumer engagement is thoroughly examined. Real-world case studies and examples underscore the profound impact of CGI in fostering creativity, brand differentiation, and audience connection in the dynamic realm of modern advertising.