It is trading of the product through computer network such as internet. E-commerce (electronic commerce or EC) is the buying and selling of goods and services, or the transmitting of funds or data, over an electronic network, primarily the Internet. These business transactions occurs business-to-business, business-to-consumer, consumer-to-consumer or consumer-to-business. The terms e-commerce and e-business are often used interchangeably. The term e-tail is also sometimes used in reference to transactional processes around online retail. E-commerce is conducted using a variety of applications, such as email, fax, online catalogs and shopping carts, Electronic Data Interchange (EDI), File Transfer Protocol, and Web services. Most of this is business-to-business, with some companies attempting to use email and fax for unsolicited ads (usually viewed as spam) to consumers and other business prospects, as well as to send out e-newsletters to subscribers. When you purchase a good or service online, you are participating in ecommerce. Some advantages of ecommerce for consumers are: Convenience. Ecommerce can take place 24 hours a day, seven days a week. Selection. Many stores offer a wider array of products online than they do in their brick-and-mortar counterparts. And stores that exist only online may offer consumers a selection of goods that they otherwise could not access. But ecommerce also has its disadvantages for consumers: Limited customer service. If you want to buy a computer and you’re shopping online, there is no employee you can talk to about which computer would best meet your needs. No instant gratification. When you buy something online, you have to wait for it to be shipped to your home or office. No ability to touch and see a product. Online images don’t always tell the whole story about an item. Ecommerce transactions can be dissatisfying when the product the consumer receives is different than expected.