PayPal integration is the process of connecting your website or application to PayPal so that you can accept payments from customers. This can be done using the PayPal APIs or by using a third-party plugin or extension.
Once you have integrated PayPal into your website or application, customers will be able to pay for their purchases using their PayPal account. This can be a convenient and secure way for customers to pay, and it can also help to increase sales.