What is the exact meaning for enhancement in SAP?

In SAP, an enhancement refers to a method of modifying or extending standard SAP applications without altering the original codebase. This allows businesses to customize functionalities to meet their specific requirements while maintaining system integrity during upgrades. Enhancements can be implemented through various mechanisms, such as user exits, customer exits, BAdIs (Business Add-Ins), and enhancement spots. This approach ensures that the core system remains stable and compliant with SAP's updates.