Implementation of Grand Theory in Marketing Science is designed as a comprehensive guide for the general public who wish to gain a deeper understanding of marketing science in the rapidly evolving digital era. Based on the need for a strong yet practical conceptual foundation, this book presents grand theory as the primary framework for understanding consumer behavior, market dynamics, and data-driven marketing strategies in an environment shaped by artificial intelligence (AI), the platform economy, and social commerce. The book also highlights thematic developments in marketing thought through cutting-edge bibliometric analysis, illustrating the growing integration of psychology, technology, and data analytics in the field of marketing. It concludes with a multi-theoretical integration framework for understanding contemporary marketing issues, providing readers with a broader perspective on the evolution of marketing science in the digital age. As a result, this book serves as an accessible and insightful resource for the general public, helping readers develop a clearer understanding of modern marketing concepts and their relevance to everyday life.