I created a small shop with shopify with the default payment gateway, ie paypal express checkout.
When customers click on the paypal checkout button, they are asked to enter their credit card number AND to enter an email and choose a password in order to register to paypal.
However, it seems possible to configure paypal to avoid asking paypal account registration to the customers, as described here.
Which paypal solution should I choose? I have "Paypal express checkout", "Paypal payflow link", "Paypal payments advanced" as available choice.