Chitosan is widely used in the agricultural sector as a natural biostimulant and elicitor, enhancing plant growth and resistance to diseases. It acts as a seed coating to improve germination rates and protect against soil-borne pathogens. In the food industry, it serves as an edible coating to extend the shelf life of fruits and vegetables by reducing microbial contamination and controlling moisture loss. It is also employed as a natural preservative in meat and seafood products. In water treatment, chitosan is utilized as a flocculating agent to remove heavy metals, dyes, and other pollutants from wastewater. Its biodegradability and non-toxic nature make it an eco-friendly alternative to synthetic chemicals. In the medical field, chitosan is used in wound dressings and hemostatic agents due to its antimicrobial properties and ability to promote tissue regeneration. It is also explored in drug delivery systems for its ability to encapsulate and release active ingredients in a controlled manner. Additionally, chitosan finds applications in cosmetics as a moisturizing and anti-aging agent, improving skin texture and elasticity. Its versatility and biocompatibility make it a valuable material across various industries.