Selective media refers to a type of growth medium used in microbiology that allows certain types of microorganisms to grow while inhibiting others. This is achieved by adding specific nutrients or inhibitors that favor the growth of desired organisms, such as bacteria or fungi, while suppressing unwanted species. An example of selective media is Mannitol Salt Agar, which is used to isolate Staphylococcus species. The high salt concentration in this medium inhibits the growth of most other bacteria, allowing for the selective cultivation and identification of Staphylococcus aureus and other salt-tolerant organisms.