Microbial biodegradation is the biological process by which microorganisms, such as bacteria and fungi, biochemically transform or break down organic compounds, including complex natural substances and anthropogenic pollutants, into simpler forms. This academic concept and research field investigates the metabolic pathways, enzymatic mechanisms, and ecological roles of microbial communities involved in the utilization and conversion of these substrates, highlighting its critical ecological significance in biogeochemical cycles and its practical application in environmental remediation strategies.