PayPal allows payment through credit cards, bank accounts, buyer credit, or PayPal account balances. You can use PayPal as a payment provider for customer checkout and processing for your Shopify store.
PayPal is one of Shopify’s default payment providers. As soon as you open a Shopify store, you're given a PayPal Express Checkout account that is linked to the email address you used to sign up for your Shopify store. Before you can collect payments for orders made with PayPal, you need to set up your PayPal account.
If you don't have Shopify Payments activated, then you're charged third-party transaction fees each time that a customer makes a purchase using this payment method.
Depending on your store's location, you might be able to use PayPal to pay your Shopify bills. For more information, see Billing FAQs.