The article reviews the role of Plant Growth Promoting Rhizobacteria (PGPR) in sustainable agriculture. PGPR are beneficial bacteria that enhance plant growth through various mechanisms, including regulating hormonal and nutritional balance, inducing resistance against pathogens, and solubilizing nutrients. The review highlights the importance of PGPR as biofertilizers, which can improve crop yields and soil fertility without the environmental impact of synthetic fertilizers. However, the application of PGPR is limited by their sensitivity to environmental conditions and competition from synthetic fertilizers. Nano-encapsulation technology is proposed as a solution to enhance the efficacy of PGPR, making them more stable and effective in agricultural practices. The review also discusses the diverse mechanisms by which PGPR promote plant growth, such as abiotic stress tolerance, nutrient availability, production of plant growth regulators, and the production of hormones and enzymes. Despite the benefits of PGPR, some studies have shown that certain bacterial species can have dual effects, both positive and negative, on plant growth. The article concludes by emphasizing the need for further research and technological advancements to fully realize the potential of PGPR in sustainable agriculture.The article reviews the role of Plant Growth Promoting Rhizobacteria (PGPR) in sustainable agriculture. PGPR are beneficial bacteria that enhance plant growth through various mechanisms, including regulating hormonal and nutritional balance, inducing resistance against pathogens, and solubilizing nutrients. The review highlights the importance of PGPR as biofertilizers, which can improve crop yields and soil fertility without the environmental impact of synthetic fertilizers. However, the application of PGPR is limited by their sensitivity to environmental conditions and competition from synthetic fertilizers. Nano-encapsulation technology is proposed as a solution to enhance the efficacy of PGPR, making them more stable and effective in agricultural practices. The review also discusses the diverse mechanisms by which PGPR promote plant growth, such as abiotic stress tolerance, nutrient availability, production of plant growth regulators, and the production of hormones and enzymes. Despite the benefits of PGPR, some studies have shown that certain bacterial species can have dual effects, both positive and negative, on plant growth. The article concludes by emphasizing the need for further research and technological advancements to fully realize the potential of PGPR in sustainable agriculture.