Once installed, the Administrator can easily switch to another user with 2 clicks, then shop the store as that user would see it, with all functionality and plugins that would only be visible to that user, working perfectly. Such as those that work with User roles, inputting custom variables (meta) on product order that are not supported in the Admin Orders screen, etc. This enables incredibly quick and simple manual order creation. And with another click they can switch back to the Administrator or Shop Manager.