The biosynthesis or green synthesis of nanoparticles has been proposed as a cost-effective and environmentally friendly alternative to chemical and physical methods. Plant-mediated synthesis of nanoparticles is a green chemistry approach that connects nanotechnology with plants. Plants are nature’s “chemical factories”. They are cost efficient and require low maintenance. It also termed as metallic nanoparticles where plant extract combined with metals like Silver and Gold, Which has a vital role in medical world.