Hydrogels, composed of hydrophilic polymer networks, are versatile materials in biomedical applications due to their high water content, biocompatibility, and tunable properties. They mimic natural tissue environments, enhancing cell viability and function. Hydrogels' tunable physical properties allow for tailored antibacterial biomaterials, wound dressings, cancer treatment, and tissue engineering scaffolds. Their ability to respond to physiological stimuli enables controlled release of therapeutics, while their porous structure supports nutrient diffusion and waste removal, fostering tissue regeneration and repair. In wound healing, hydrogels provide a moist environment, promote cell migration, and deliver bioactive agents and antibiotics, enhancing the healing process. For cancer therapy, they offer localized drug delivery systems that target tumors, minimizing systemic toxicity and improving therapeutic efficacy. Ocular therapy benefits from hydrogels' capacity to form contact lenses and drug delivery systems that maintain prolonged contact with the eye surface, improving treatment outcomes for various eye diseases. In mucosal delivery, hydrogels facilitate the administration of therapeutics across mucosal barriers, ensuring sustained release and improved bioavailability of drugs. Tissue regeneration sees hydrogels as scaffolds that mimic the extracellular matrix, supporting cell growth and differentiation for repairing damaged tissues. Similarly, in bone regeneration, hydrogels loaded with growth factors and stem cells promote osteogenesis and accelerate bone healing. This article highlights recent advances in the use of hydrogels for various biomedical applications, driven by their ability to be engineered for specific therapeutic needs and their interactive properties with biological tissues. Hydrogels are classified into three types based on the source of material: natural, synthetic, and hybrid. Natural polymers include cellulose, chitosan, chitin, starch, alginate, and carrageenan. Synthetic polymers include poly(lactic acid), poly(vinylpyrrolidone), polycaprolactone, poly(vinyl alcohol), and poly(ethylene glycol). Physical and chemical cross-linking are the two main types of hydrogel formation processes. Physical cross-linking involves noncovalent bonds, while chemical cross-linking involves covalent bonds. Hydrogels made of natural polymers with unique functional interfaces have been developed, offering superior mechanical qualities and being appealing candidates for regenerative medicine. Hydrogels are used in drug delivery systems to provide sustained release of medication. They keep drugs from degrading and eliminate their negative effects, such as short half-lives and poor water solubility. Benefits from the usage of hydrogels in drug delivery include fewer adverse effects, effective drug utilization, precise drug targeting to certain areas, and inexpensive prices. Hydrogel films have a greater surface area than hydrogel particles and can be used to bandage sores to protect them while they are being treated. Nanogels can enhance the bioavailability of insoluble pharmaceuticals, accomplish regulated and prolonged discharge drug administration, allow focused drug administration, and actHydrogels, composed of hydrophilic polymer networks, are versatile materials in biomedical applications due to their high water content, biocompatibility, and tunable properties. They mimic natural tissue environments, enhancing cell viability and function. Hydrogels' tunable physical properties allow for tailored antibacterial biomaterials, wound dressings, cancer treatment, and tissue engineering scaffolds. Their ability to respond to physiological stimuli enables controlled release of therapeutics, while their porous structure supports nutrient diffusion and waste removal, fostering tissue regeneration and repair. In wound healing, hydrogels provide a moist environment, promote cell migration, and deliver bioactive agents and antibiotics, enhancing the healing process. For cancer therapy, they offer localized drug delivery systems that target tumors, minimizing systemic toxicity and improving therapeutic efficacy. Ocular therapy benefits from hydrogels' capacity to form contact lenses and drug delivery systems that maintain prolonged contact with the eye surface, improving treatment outcomes for various eye diseases. In mucosal delivery, hydrogels facilitate the administration of therapeutics across mucosal barriers, ensuring sustained release and improved bioavailability of drugs. Tissue regeneration sees hydrogels as scaffolds that mimic the extracellular matrix, supporting cell growth and differentiation for repairing damaged tissues. Similarly, in bone regeneration, hydrogels loaded with growth factors and stem cells promote osteogenesis and accelerate bone healing. This article highlights recent advances in the use of hydrogels for various biomedical applications, driven by their ability to be engineered for specific therapeutic needs and their interactive properties with biological tissues. Hydrogels are classified into three types based on the source of material: natural, synthetic, and hybrid. Natural polymers include cellulose, chitosan, chitin, starch, alginate, and carrageenan. Synthetic polymers include poly(lactic acid), poly(vinylpyrrolidone), polycaprolactone, poly(vinyl alcohol), and poly(ethylene glycol). Physical and chemical cross-linking are the two main types of hydrogel formation processes. Physical cross-linking involves noncovalent bonds, while chemical cross-linking involves covalent bonds. Hydrogels made of natural polymers with unique functional interfaces have been developed, offering superior mechanical qualities and being appealing candidates for regenerative medicine. Hydrogels are used in drug delivery systems to provide sustained release of medication. They keep drugs from degrading and eliminate their negative effects, such as short half-lives and poor water solubility. Benefits from the usage of hydrogels in drug delivery include fewer adverse effects, effective drug utilization, precise drug targeting to certain areas, and inexpensive prices. Hydrogel films have a greater surface area than hydrogel particles and can be used to bandage sores to protect them while they are being treated. Nanogels can enhance the bioavailability of insoluble pharmaceuticals, accomplish regulated and prolonged discharge drug administration, allow focused drug administration, and act