Customers receive an error message if inventory is no longer available.

Yes, merchants can configure checkout to accept email only.

Yes, merchants can enable phone number collection during checkout.

Customers provide contact, shipping, billing, and payment information.

Yes, merchants can switch between one-page and three-page checkout layouts.

Yes, some checkout fields can be set as required, optional, or hidden.

You can access checkout settings from Shopify Admin > Settings > Checkout.