What is the purpose of the Starter system in the SAP S/4HANA Cloud implementation project?

According to the SAP S/4HANA Cloud, public edition Learning Journey1, the purpose of the Starter system in the SAP S/4HANA Cloud implementation project is to demonstrate SAP Best Practices processes in a preconfigured system and identify customer personalization requirements. The Starter system is a system that contains sample data and scenarios that showcase the standard processes and functionalities provided by SAP S/4HANA Cloud. The Starter system is used in the Explore phase of the implementation project to conduct the Fit-to-Standard workshops, where the customer’s business requirements are compared with the standard processes and functionalities.