Shopper's can choose to load their PayPal wallet with funds from their credit or debit cards, or link the PayPal wallet directly with their bank account.
PayPal supports major cards such as Visa, Mastercard, Discover and American Express and lets shopper's pay without revealing their card details online. Shopper's can also use alternative payment methods (APMs), bank transfers and recurring payments.
There is also direct funding, where the shopper has no stored cash in their PayPal wallet. Funds are directly debited from their linked payment method.
For more information, see the PayPal website.