Set conditions under which checkout process will be allowed in your online store.
Screenshot: Registration settings (Admin panel)
Only guest customers: only guest customers can place orders without creating accounts.
Only registered customers: only registered customers or those who create a new account can place order.
Registered and guest customers: all customers can place orders. New customers can access checkout as guest or create a new account while placing an order.
If this option is enabled, all guest customers will be automatically registered and a password will be sent to their email.
Create an Account checkbox
Set "Checked" or "Unchecked" for the "Create an Account" checkbox. If this option is enabled, the account will be created automatically for all unregistered users who make an order in your store.