Payment processing refers to the series of steps involved in handling transactions made through credit cards, debit cards, and other electronic payment methods. It encompasses everything from the initial authorization of a payment to the final settlement of funds in a merchant's account. This process is crucial for businesses to facilitate smooth and secure transactions with their customers. In today's digital economy, payment processing has evolved significantly, incorporating advanced technologies such as blockchain and mobile wallets. These innovations enhance security and efficiency, allowing consumers to make purchases quickly and safely, while providing merchants with reliable tools to manage their sales and customer interactions.