A payment processor is a service that helps businesses accept payments from customers. When you buy something online or in a store, the payment processor securely handles the transaction by connecting the buyer's bank account or credit card to the seller's account. This ensures that money is transferred safely and quickly, allowing for smooth purchases. These processors work with various payment methods, including credit cards, debit cards, and digital wallets like PayPal or Apple Pay. They also help protect sensitive information, making sure that your personal data remains secure during the transaction. Overall, payment processors play a crucial role in modern commerce.