Internet is a really-really vast topic to talk about and so, a thousand of rubbish can be said about internet. But here, we will talk about only the useful educational things along with the meaning of several things.
International Network of Computers (internet):-
Lets talk about the history of internet, about from where internet started (about origins of internet). Internet in its first years was used as a network of communication in US army and was then known as DARPANET. DARPANET network was started in 1969 and was primarily used for the defense department of US. DARPANET was then changed to ARPANET in 1992 and it was an abbreviation for Advanced Research Projects Agency Network which was then used by the universities to share their knowledge and data. It was over time called as Internet which can also be said as . It was the first network which used packet switching TCP/IP. Packet Switching is the term used for the process in which data is broken into small packets and then it is sent over a network best optimised for its transmission and is then reassembled at the destination. TCP stands for Transmission Control Protocol and IP stands for Internet Protocol.
These are all based on facts and this history is what i have read in my textbooks.
Now, what is Internet? Internet is a global connection of computers or a global network of computers which provide variety of facilities to a computer user such as file sharing, email services, entertainment, social networking, chatting, video chatting, and much-much more. Most of the universities and students rely on internet for educational purposes. Universities use internet to share their vital research papers, documents, etc. Students use internet to share their notes, watch experimental videos, video lectures, etc. Most of the common people use internet for watching videos and entertainment purposes like watching movies, playing online multiplayer games, downloading files, music, online shopping, e-commerce, online banking, even some people use internet to earn money. Internet has become a part of people's lives.