Enabling PayPal Checkout
From Spiffy Stores Knowledge Base
PayPal Checkout adds PayPal as a payment method in your checkout. The customer submits their order, and is redirected to the PayPal site to pay for their order. At this point, the order is saved in your store with the payment status set to "Unpaid".
When they have paid, they are redirected back to your store, and your store marks the payment as received.
If you also want to enable PayPal Express, you will need to have a PayPal Business account. If you don't have a PayPal Business account, click here to sign up for a PayPal account, and then return to this page.