E-commerce: The buying and selling of goods or services using the Internet and the transfer of money and data to execute these transactions. E-commerce can be conducted over computers, tablets, smartphones, and other smart devices. It encompasses a wide range of data, systems, and tools for online buyers and sellers, including mobile shopping and online payment encryption. E-commerce platforms can be focused on business-to-business (B2B), business-to-consumer (B2C), consumer-to-consumer (C2C), or consumer-to-business (C2B) transactions. It has transformed retail through online marketplaces, electronic payment systems, online shopping, and digital marketing. E-commerce also includes customer data protection and compliance with regulations such as PCI DSS.