Used in microbiology laboratories for the selective isolation and detection of Staphylococcus species, particularly Staphylococcus aureus, from clinical, food, and environmental samples. The medium suppresses the growth of unwanted bacteria such as Gram-negative organisms and some other Gram-positive bacteria, allowing Staphylococci to grow with distinct colony morphology. It is commonly used in quality control testing in pharmaceuticals, cosmetics, and healthcare settings to meet sterility and microbial limits as specified in pharmacopoeial standards. Its selectivity comes from specific inhibitors and nutrients that favor Staphylococcus growth, making it ideal for rapid screening and confirmation when combined with additional identification tests.