The genus Streptomyces is characterized by a unique assemblage of Gram-positive bacteria, which exhibit a multifaceted spectrum of pigment secretion, colony color, and other characteristic traits. Streptomyces plays a significant role in producing physiologically active compounds, including antivirals, immunosuppressants, antibiotics, antihypertensives, fungicides, and anticancer agents. Streptomyces synthesize compounds such as auxins (indole acetic acid (IAA)), cytokinins, and gibberellins. Ecologically, these bacteria also play a crucial role in decomposing organic matter, biogeochemical cycling, and enhancing soil fertility. The genus Streptomyces is widely distributed in terrestrial and marine ecosystems, as well as in healthy plant tissues (as endophytes), and exhibits a high degree of diversity. The classification of Streptomyces is based on several characteristics, including the color of aerial and substrate mycelium, pigment production, other morphological traits, and structural features such as the arrangement of spore chains. Their classification also involves the use of a variety of modern methods, including molecular tools, chemical profiling, genomic sequencing (phylogenetic approach), and numerical taxonomy. Physiologically, Streptomycetes undergo programmed cell death (PCD), during which the vegetative mycelium lyses to provide nutrition to the secondary mycelium. These released nutrients may also attract other microbes.