Generative AI, the branch of artificial intelligence that can create text, images, audio, video, and code, has rapidly evolved from a niche research area to a global technological force, fueled by breakthroughs like transformer architectures. Since 2020, investment has surged, with AI startups raising over US$32.9 billion in the first five months of 2025 alone, and the market projected to grow from US$38 billion in 2025 to nearly US$1 trillion by 2034. Adoption is now mainstream, with 75% of businesses already using generative AI in areas such as marketing, customer service, and healthcare, and projections that it will drive almost 90% of customer interactions by 2025. In India, startups have multiplied nearly fourfold in a year, government-backed projects like BharatGen are pushing multilingual innovation, and generative AI could contribute up to US$1.5 trillion to GDP by 2030. Technological leaps in 2025 include OpenAI’s GPT-5 with expert-level reasoning and real-time code generation, Google DeepMind’s Genie 3 that builds interactive 3D worlds from text, and emotionally intelligent AI agents that can simulate psychological engagement. While these advances promise massive productivity gains, creativity boosts, and economic impact, they also raise urgent ethical, regulatory, and societal questions—making the rise of generative AI one of the most transformative and debated developments of the 21st century.