This book discusses the diverse and promising uses of algae in various industries and biotechnological processes. Algae, as a photosynthetic organism, is found in varied habitats around the world. It has garnered significant attention in recent years due to its remarkable potential as a sustainable and environmentally friendly resource. This book aims to bridge the gap between scientific knowledge and practical applications by exploring the cutting-edge research, innovations, and emerging trends in the field of algal biotechnology. With a focus on both industrial and biotechnological aspects, this book delves into the wide array of applications that algae offers. From renewable energy and wastewater treatment to pharmaceuticals, nanomaterial, cosmetics, and personal care products, each chapter examines a specific area where its unique properties are harnessed to address pressing global challenges. Additionally, the book explores the role of algae in improving food production, supporting aquaculture, and contributing to carbon capture and utilization efforts. This book is a resource for scientists, researchers, industry professionals, and policymakers that highlights the potential of algae as a sustainable and versatile solution across multiple sectors. By presenting the latest advancements in algal biotechnology, the book seeks to inspire further research, foster innovation, and promote the integration of algae into mainstream industrial and biotechnological practices.