Silver nanoparticles (AgNPs) have gained significant attention due to their unique physical and chemical properties, making them valuable in various fields such as medicine, food, and industry. This review discusses the synthesis methods of AgNPs, including biological, chemical, and physical approaches, and highlights their diverse applications in healthcare, antibacterial therapy, and cancer treatment. The review also addresses the challenges associated with AgNPs, such as environmental impact and toxicity, and explores future research directions to enhance their utility. The synthesis of AgNPs involves techniques like green synthesis using plant extracts, bacterial, fungal, and yeast-based methods, as well as chemical and physical methods. Each method has its advantages and limitations, with green synthesis being more eco-friendly and cost-effective. The characterization of AgNPs is crucial for understanding their properties and applications, with techniques such as UV-Vis spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy-dispersive X-ray spectroscopy (EDS) being commonly used. The review emphasizes the importance of optimizing synthesis parameters to achieve desired nanoparticle properties and ensures their safe and effective use in various fields. The potential of AgNPs in healthcare and food industry is highlighted, along with their role in combating antibiotic resistance and improving food safety. The review concludes by discussing the need for further research to enhance the scalability and industrial feasibility of AgNPs.Silver nanoparticles (AgNPs) have gained significant attention due to their unique physical and chemical properties, making them valuable in various fields such as medicine, food, and industry. This review discusses the synthesis methods of AgNPs, including biological, chemical, and physical approaches, and highlights their diverse applications in healthcare, antibacterial therapy, and cancer treatment. The review also addresses the challenges associated with AgNPs, such as environmental impact and toxicity, and explores future research directions to enhance their utility. The synthesis of AgNPs involves techniques like green synthesis using plant extracts, bacterial, fungal, and yeast-based methods, as well as chemical and physical methods. Each method has its advantages and limitations, with green synthesis being more eco-friendly and cost-effective. The characterization of AgNPs is crucial for understanding their properties and applications, with techniques such as UV-Vis spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy-dispersive X-ray spectroscopy (EDS) being commonly used. The review emphasizes the importance of optimizing synthesis parameters to achieve desired nanoparticle properties and ensures their safe and effective use in various fields. The potential of AgNPs in healthcare and food industry is highlighted, along with their role in combating antibiotic resistance and improving food safety. The review concludes by discussing the need for further research to enhance the scalability and industrial feasibility of AgNPs.