电子商务，简称电商，是指在互联网或电子交易方式进行交易活动和相关服务活动，是传统商业活动各环节的电子化、网络化。
E-commerce refers to transactions and related service activities conducted over the internet or electronically. It represents the digitization and networking of all aspects of traditional commercial activities.
电子商务包括电子货币交换、供应链管理、电子交易市场、网络购物、网络营销、在线事务处理、电子数据交换（EDI）、存货管理和自动数据收集系统。在此过程中，利用到的信息技术包括互联网、万维网、电子邮件、数据库、电子目录和移动电话。
电子商务通常是指在全球各地广泛的商业贸易活动中，在因特网开放的网络环境下，基于客户端/服务端应用方式，买卖双方不谋面地进行各种商贸活动，实现消费者的网上购物、商户之间的网上交易和在线电子支付以及各种商务活动、交易活动、金融活动和相关的综合服务活动的一种新型的商业运营模式。各国政府、学者、企业界人士根据自己所处的地位和对电子商务参与的角度和程度的不同，给出了许多不同的定义。电子商务分为：ABC、B2B、B2C、C2C、B2M、M2C、B2A（即B2G）、C2A（即C2G）、O2O等。
电子商务是以信息网络技术为手段，以商品交换为中心的商务活动。“电子商务”，“电子”是一种技术，是一种手段，而“商务”才是最核心的目的，一切的手段都是为了达成目的而产生的。而电子商务师就是利用计算机的技术、网络技术等现代信息技术来进行相关工作的人员。
E-commerce encompasses electronic currency exchange, supply chain management, electronic marketplaces, online shopping, online marketing, online transaction processing, electronic data interchange (EDI), inventory management, and automated data collection systems. Information technologies utilized in this process include the internet, the World Wide Web, email, databases, electronic catalogs, and mobile phones.
E-commerce generally refers to a new business model that allows for online shopping, online transactions between merchants, online electronic payments, and various other business, trading, financial, and related integrated service activities, all within the open network environment of the internet, across a wide range of global commercial transactions. This model is based on client/server applications, enabling online transactions between buyers and sellers, enabling online shopping for consumers, online transactions between merchants, online electronic payments, and various other business, trading, financial, and related integrated service activities. Governments, scholars, and business leaders have offered diverse definitions, depending on their respective positions, perspectives, and levels of involvement in e-commerce. E-commerce is categorized into various types: ABC, B2B, B2C, C2C, B2M, M2C, B2A (also known as B2G), C2A (also known as C2G), and O2O.
E-commerce is a business activity centered on the exchange of goods, using information and network technologies as a means. “E-commerce” (electronic) refers to a technology, a means, while “business” is the core purpose. All means are designed to achieve this goal. An e-commerce specialist is someone who utilizes modern information technologies such as computers and networks to carry out related work.