Business Partner is a new object in SAP S/4 HANA. It was first incorporated with APO (the advanced planning tool of SAP), and it allows the representation of individuals, organizations or group of persons that contain the required data for Warehouse transactions.
In this way, for instance, it can take on the roles or functions of Suppliers, Customers, other Plants, Third-party logistics partners (3PLs), Freight Contractors, Carriers, …
Apart from being used EWM, this object replaces Suppliers and Customers in S4 HANA, which in previous SAP ERP releases were different objects.
As we can see in the following screenshot, by default, S4 proposes a high number of functions which we can add to each Business Partner