When a shopper provides an email address at Checkout, the platform tries to retrieve existing profile information for that email and add it to the shopping cart information. Use this request if you want to change this behavior for a given cart, meaning profile information will not be included in the order automattically.
The orderForm is the data structure which represents a shopping cart and contains all information pertaining to it. Hence, the orderFormId is the identification code of a given cart.
Note that this request will only work if you have not sent the clientProfileData to the cart yet. Sending it to a cart that already has a clientProfileData should return a status 403 Forbidden error, with an Access denied message.
Click Try It! to start a request and see the response here!