The internet is an informal term for the world-wide communication network of computers.
The internet is used to send information quickly between computers around the world. It has millions of smaller domestic, academic, business, and government networks and websites, which together carry many different kinds of information (facts and details) and services. So in other words, the Internet is a network of networks.
The internet was developed in the United States by the "United States Department of Defense Advanced Research Projects Agency" (DARPA). It was first connected in October, 1969, and was called ARPANET. The World Wide Web was created at CERN in Switzerland in 1990 by a British (UK) man named Tim Berners-Lee.
Today, people can pay money to access the internet from internet service providers. Some services on the Internet cost nothing to use. Sometimes the people who offer these free services use advertising to make money from them. The alternative (other) name, "net" came from "inter(net)".
Services on the internet
The most used service on the internet is the World Wide Web (which is also called the "Web"). The Web contains websites, blogs, and also wikis like Wikipedia. Webpages on the internet can be seen and read by anyone (unless the page needs a password, or it is blocked).
The second biggest use of the internet is to send and receive e-mail. E-mail is private and goes from one user to another. Instant messaging (such as AIM or ICQ) is similar to email, but allows two or more people to chat to each other much faster.
Some governments think the Internet is a bad thing, and block all or part of it. For example, the Chinese government thinks that Wikipedia is bad. Many times no one in China can read it or add to it. Some parents block parts of the internet they think are bad for children to see. Well-known examples of the whole internet being blocked are in North Korea and Myanmar.
Internet for Kids. Kiddle Encyclopedia.