This is a PayPal Express Payment Gateway for WooCommerce.
PayPal Express allows you to securely sell your products and subscriptions online using In-Context Checkout to help you meet security requirements without causing your theme to suffer. In-Context Checkout uses a modal iFrame, hosted on PayPal’s servers, that overlays the checkout form and provides a secure means for your customers to enter their account information.
Also, with Integrated PayPal Setup (Easy Setup), connecting to PayPal is as simple as clicking a button – no complicated API keys to cut and paste.
Page officielle : https://fr.wordpress.org/plugins/woocommerce-gateway-paypal-express-checkout/