This research investigates the transformative role of Artificial Intelligence (AI) in marketing, specifically focusing on its impact on promotional strategies and advertising. As the industry shifts toward data-driven, algorithm-mediated communication, AI is becoming essential for audience targeting, ad creation, and budget optimization. The study explores core technologies, including Machine Learning, Natural Language Processing, and Sentiment Analysis, which provide precise insights into customer behaviour. By analysing case studies from Google, Facebook, and Lexus, the paper demonstrates how AI enhances efficiency and ROI. Ultimately, the research highlights AI’s pivotal role in shaping a more competitive, personalized, and efficient future for global advertising.