The global shift towards sustainable energy resources highlights the importance of biomass as a promising path for generating green, renewable energy. This study synthesizes modern research and technological improvements in biomass feedstocks, bioenergy conversion approaches, and integrated biorefinery systems. It explores the multifaceted position of biomass in addressing power safety, mitigating climate change, and fostering financial improvement, in particular in emerging economies. The paper evaluates diverse biomass resources, along with lignocellulosic materials, dairy waste, and microalgae, and discusses their conversion into biofuels and biochemicals via tactics including fermentation, anaerobic digestion, and biochemical conversion. It similarly delves into the environmental and monetary implications of biomass usage, highlighting the challenges and opportunities in enhancing efficiency, reducing fees, and making sure sustainability. By supplying a comprehensive evaluate of the modern country and future instructions of bioenergy research, this paper pursuit to make contributions to the development of low-carbon, renewable fuel options and advance the global transition towards a more sustainable and varied energy portfolio.