E-commerce
E-commerce, or electronic commerce, is the buying and selling of goods and services, or the transmission of funds or data, over an electronic network, primarily the Internet.[1] This activity occurs through digital platforms and devices, encompassing transactions between businesses and consumers (B2C), businesses and businesses (B2B), consumers and consumers (C2C), and other models.[2][3] E-commerce traces its origins to the 1970s with the development of electronic data interchange (EDI) for business document exchange, but it expanded significantly in the 1990s with the advent of the World Wide Web and secure online payments.[4][5] Pioneering milestones include the first computerized online sale in 1972 via a CompuServe system and the invention of electronic shopping by Michael Aldrich in 1979, followed by the launch of major platforms like Amazon in 1995.[4][5] These developments enabled scalable digital marketplaces, reducing geographical barriers and transaction costs through automated processes.[6] By 2024, global e-commerce revenue exceeded $4.5 trillion, with projections indicating continued expansion to represent over 20% of worldwide retail sales by 2025.[7][8] This growth stems from increased internet penetration, mobile device usage, and logistical efficiencies, fostering economic productivity via direct producer-to-consumer channels and data-driven personalization.[9] However, e-commerce has concentrated market power in dominant platforms, prompting antitrust scrutiny over practices that may stifle competition, alongside persistent challenges in consumer data privacy and protection against fraud.[10][11]