Biofilm is a community of microorganisms that adhere to surfaces and are embedded in a self-produced matrix of extracellular polymeric substances (EPS). These microorganisms can be bacteria, fungi, algae, or protozoa, and they work together to form a complex and resilient structure. Biofilms are commonly found in natural environments, as well as on medical devices, industrial equipment, and other surfaces. They are important in various fields such as environmental science, medicine, and industrial engineering, as they can have beneficial or detrimental effects depending on the context. Research in the area of biofilms focuses on understanding their formation, structure, function, and potential applications.