Samsung Pay is a payment system available on most Samsung Galaxy phones, allowing users to make secure payments.

It supports NFC payments (card present), browser-based transactions through Samsung Pay Web, and in-app purchases (card not present). Customers can select Samsung Pay at checkout, with payment authenticated through fingerprint, iris scan, or PIN on their mobile device.

For integration details, refer to Samsung's documentation, and developers can register at Samsung's developer portal for further information.