Digital transformation has emerged as a critical driver of economic growth and competitiveness in the global economy. By integrating advanced technologies such as artificial intelligence, blockchain, cloud computing, and the Internet of Things (IoT), organizations across industries are reshaping their operational models, enhancing productivity, and promoting innovation. This study examines the multifaceted impact of digital transformation on global economy competitiveness, focusing on how businesses, governments, and societies are adapting to the rapidly evolving digital landscape. It describes the evolution of digital transformation through the literature review, while highlighting the key digital transformation drivers, gains, challenges, and the relationship between digital transformation and global economy with United States of America, United Kingdom, China and South Africa as case studies using a systematic literature review approach. The study underscores the necessity for digital transformation implementation strategy to sustain competitive advantage in an interconnected world. The findings contribute to a deeper understanding of how digital transformation not only disrupts traditional economic paradigms but also creates opportunities for sustainable growth and innovation in the 21st century by presenting an all-inclusive comprehensive digital transformation implementation strategy for the global competitive economy.