Biofertilizers (BF) are an eco-friendly additive that decreases reliance on chemical fertilisers, alleviates their adverse impacts, and aids in reducing expenses and agricultural requirements. They are bioactive microbe formulations that enhance plant growth and development by enhancing nutrient uptake. In addition, they enhance soil productivity through the process of nitrogen fixation, wherein they convert atmospheric nitrogen into a form that can be utilized by plants. They also facilitate the dissolution of phosphorus in the soil and enhance the accessibility of potassium, so increasing its availability to plants. This application shows great potential in the realm of sustainable crop production. The purpose of this review is to provide a clear understanding of the key issues concerning biofertilizers, including their many types, uses, and the benefits they offer when applied. Additionally, it will discuss the primary methods of administering biofertilizers to plants and their function in enhancing plant resistance to salinity stress.