E-commerce is a transaction of buying or selling online. Electronic commerce makes use of innovations such as mobile commerce, electronic funds transfer, supply chain management, Online marketing, online transaction processing, electronic data interchange (EDI), inventory management systems, and automated information collection systems. Modern electronic commerce usually uses the Web for at least one part of the deal’s life process although it might likewise use other technologies such as email.
E-commerce companies may utilize some or all of the following:
Online shopping web sites for retail sales direct to customers
Supplying or participating in online marketplaces, which process third-party business-to-consumer or consumer-to-consumer sales
Business-to-business trading
Gathering and utilizing demographic data through web contacts and social media
Business-to-business (B2B) electronic information interchange
Marketing to potential and recognized customers by email or fax (for example, with newsletters).
Engaging in pretail for launching new products and services.
Online monetary exchanges for currency exchanges or trading purposes.
Source