SAP MM (Materials Management) is a module of the SAP ERP software package from SAP AG that is designed to manage procurement, inventory, and supply chain processes efficiently. It plays a crucial role in material planning, purchasing, vendor evaluation, and warehouse management. SAP MM integrates with other modules like SD (Sales and Distribution), PP (Production Planning), and FI (Financial Accounting) to ensure smooth business operations. It helps organizations optimize stock levels, reduce procurement costs, and improve overall supply chain management. With automation and real-time data tracking, SAP MM enhances efficiency, accuracy, and compliance in material and inventory management.