PayPal Express Checkout can be used in place of, or in addition to, a traditional merchant account for accepting payments on your site. With PayPal Express Checkout, buyers begin checkout on your site, then go to PayPal to select a funding source, returning to your site to complete the checkout process. Yahoo! is also now fully integrated with PayPal Payments Pro which serves as a merchant account. With PayPal Payments Pro, buyers can pay with credit cards directly on your site without leaving your checkout pages to go to PayPal.
Merchants wishing to sign up for and accept PayPal as a payment method should consult the PayPal integration help. Merchant wishing to sign up for PayPal Payments Pro can refer to instructions for signing up.