When you place an order with Paypal you will be redirected to the PayPal payment page.
You will be asked to login via a secure connection and pay your order.
Paying with PayPal also grants you 180 days buyers protection.
2. Credit Card via Paypal
Even without a PayPal account you can check out through it, if you leave your credit card details with them.
You will be redirect through a secure connection to login to PayPal and pay your order.
This will also award you with the buyers protection.