The Internet is a large group of  computers that are connected to each other. The Internet is used to send information quickly between computers around the world

It is a network of networks that consists of millions of private, public, academic, business etc, linked by a broad array of electronic, wireless, and optical networking technologies. 

It uses the standard Internet protocol suite (TCP/IP) to link several billion devices worldwide.

Electronic mailSocial Networking E-commerceThe World Wide Web

Electronic mail or e-mail is a method of exchanging digital messages from an author to one or more recipients.

An Internet email message consists of three components, the message envelope, the message header, and the message body.

A Social Networking Service (also social networking site or SNS) is a platform to build social networks or social relations among people who share interests, activities, backgrounds or real-life connections. A social network service consists of a representation of each user (often a profile), his or her social links, and a variety of additional services.

Ecommerce (or electric commerce) refers to the buying and selling of goods and services via electronic channels, primarily on the Internet.

Online retail is decidedly convenient due to its 24-hour availability, global reach and generally efficient customer service.

The World Wide Web (www, W3) is an information system of interlinked hypertext documents that are accessed via the Internet and built on top of the Domain Name System. It has also commonly become known simply as the Web.Tim Berners-Lee, a British computer scientist and former CERN employee, is the inventor of the Web. On 12 March 1989, Berners-Lee wrote a proposal for what would eventually become the World Wide Web.

•World Wide Web