Another adjustment can be made to the checkout is to edit the checkout form options. You can adjust so that some of the fields in the checkout form are optional or required. For example, some customers do not want to leave their private phone number, to solve this, you can make that field optional.

This writing will provide you with the detailed guide on the topic how to edit the checkout form options on Shopify. Please read this instruction carefully and follow it step by step.

https://avada.io/shopify/docs/how-edit-checkout-form-options-shopify.html