Documentation is not Clear regarding How to Configure the Employee Abstract Role

Summary:

Is it possible to have more information regarding this topic:

https://docs.oracle.com/en/cloud/saas/sales/23a/fadsi/how-to-configure-the-employee-abstract-role-for-sales-users.html#u30236458

When and When Do we need to clone Employee Role?

What Do it means exactly this Phrase "Although these privileges aren’t used, they can incur licensing charges."?

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