Payment systems are methods that allow individuals and businesses to transfer money for goods and services. These systems can include traditional methods like cash and checks, as well as electronic options such as credit cards, debit cards, and mobile payment apps. They facilitate transactions by providing a secure way to exchange funds. In recent years, digital payment systems have gained popularity, enabling faster and more convenient transactions. Examples include PayPal, Venmo, and Apple Pay. These systems often use encryption to protect sensitive information, ensuring that both buyers and sellers can complete transactions safely and efficiently.