I’m sorry that I’m not helpful, but I do not have any other way to explain it, than what I already mentioned. It’s all very clear on the plugin description:
Allows a WooCommerce store Administrator or Shop Manager to use the frontend and assign a new order to a registered or new customer, taking advantage of all the frontend functionalities that might not exist on the backend, which can be very useful for phone or email orders.
The order will automatically be assigned to a registered customer if the billing email matches. If no registered user is found, the shop manager can decide to either create a new user or leave the order as if it was inserted by a guest.
Two new fields are added to the billing checkout section, for logged-in administrators and shop managers.
FEATURES
Enter email and phone orders directly on the frontend;
Create orders for existing users if the email address exists on the customer database;
Choose either to create a new user or leave the order as if it was inserted by a guest if the email address does not exist on the customer database;
Have you installed it and tried it?
Maybe this plugin is just not what you need.
What are you trying to achieve?
Also: please, don’t be rude.