When you place an order with Paypal you will be redirected to the PayPal payment page, where you can confirm your payment by logging in with your PayPal username and password.
If you are already a PayPal customer, you can log in with your user data and make a payment. Are you a newcomer to PayPal?
You can then log in as a guest or open your PayPal account and confirm your payment. Collections are usually booked in a few minutes and your order will be processed immediately.