This document discusses immobilization of enzymes. It defines enzyme immobilization as restricting an enzyme's movement physically or chemically while retaining its activity. Immobilizing enzymes allows them to be reused, protects them from degradation, and facilitates separation of products from enzymes. The document outlines reasons for immobilization, advantages like stability and reusability, disadvantages like diffusion limitations, and common immobilization methods like adsorption, entrapment and covalent bonding. Supports used include natural polymers, synthetic polymers and inorganic polymers.