Online payment processing refers to the electronic transfer of funds between buyers and sellers through the internet. This method has become increasingly popular due to its convenience and security. Customers can easily make purchases from anywhere at any time, and merchants can process payments quickly and securely. Online payment processing also helps businesses expand their customer base by providing a variety of payment options such as credit cards, PayPal, and other digital wallets. Overall, online payment processing is a crucial aspect of e-commerce and has revolutionized the way people shop and do business online.