Payment gateway integration is facilitated by technologies such as application programming interfaces (APIs) and third-party processors. These technologies allow businesses to connect their online platforms to varied payment processors securely. By capturing and processing transactional data, they enable seamless financial transactions, enhancing customer convenience. Additionally, built-in security measures, such as encryption and transaction monitoring, ensure data protection. This technology is crucial for e-commerce, as it enables businesses to accept payments efficiently and enhances customer trust in the transaction process.