The increased resistance displayed by humans to certain chemicals used in agriculture has boosted the demand for natural products in recent years. Innovative technologies and unique matrices have been used to develop products that can improve the efficiency of plant nutrient utilization in response to this problem. The creation of environmentally benign organic materials known as biostimulants, which stimulate plant growth by improving the efficacy of chemical fertilizers, is one method of raising agricultural output. Plant biostimulants are chemicals and/or microorganisms that, when applied to crops in small doses, can boost plant growth and production, improve product quality, and increase resource efficiency. Humic compounds, protein hydrolysates, seaweed, plant extracts, and helpful microbes are examples of biostimulants. These substances have been proven to affect plant metabolism, increase productivity, and increase plant tolerance to environmental stresses. As a result, scientific studies are needed to determine the processes that biostimulants activate.