What feature allows any employee to trigger procurement of services/items?

Employees across an organization can use the Create Purchase Requisition App to request for services or materials. This self-service requisition process, which has undergone significant optimization and digitization in SAP S/4HANA compared to SAP ERP, allows one to use shopping cart functionality similar to that of e-commerce sites, the selection of a service or item from a catalog and ability to search for a service or a material catalog.