As the online store owner, you might want to report your terms of service to your customers - to clarify rights and responsibilities of both sides. These terms will be displayed after a customer clicks the Checkout button, on the order confirmation page. Also, you can accompany the text of your terms with a check box requiring customers to confirm their accepting of the terms.
To specify your terms of service:
Until you provide your text in this field, no information you have specified on the Terms of Service tab is visible to your customers.
Customers will not be able to proceed with the order until they select the acceptance check box. If you leave this field empty, no confirmation is requested from your customers and no check box is displayed below your terms of service.