With Customizing settings enable you to adapt the non-company specific and industry-specific functions shipped to the specific business requirements of your enterprise.
Customizing supports you in the following situations:
Implementing the SAP System
Enhancing the SAP System
in release and system upgrades
Customizing controls the behavior of SAP applications. You only work with many SAP applications once you have made the necessary settings in Customizing, for example, setting the currencies and purchasing groups in Customizing that are used in your company.
To be able to transport the Customizing settings to other systems, for example, your test system, you need the transport system.
Tools for System Settings and their documentation ( Logging Customizing Changes )
Recommendations for system settings
Customizing projects as a means for controlling the management, editing and analysis processes of the implementation and upgrade projects
Support for transferring the system settings from the test system into the production system
Support when transporting system settings between different systems using Business Configuration Sets , for example for a business rollout.
Tools for system upgrades and release upgrades
Customizing does not help you to modify the standard SAP functions.