If you integrate PayPal Checkout into your online gallery, your customers can not only pay with their PayPal account in your shop, but they also have other payment methods at their disposal. This means that even customers who do not have a PayPal account can easily pay via PayPal by direct debit or credit card.
After paying via the PayPal checkout, the customer is redirected back to the shop and must confirm the order there to finalise the purchase. If the customer does not do this, you will see the authorised payment in your PayPal account. Do not collect this, as the customer has not completed the order.
To use your PayPal account in the online gallery, you need to make one more setting. To do this, click on Settings / Payment methods in the admin area. Here you need to tick the PayPal box and then select PayPal Checkout (REST API). Enter your API key (CLIENT ID) and key in the corresponding field and click on save.
Make sure you enter the details of your PayPal business customer account correctly, otherwise no payments will be received.