why & why?

Why IT have to introduce, is it because the reasons people have the common interest in life, they deal with so much enjoyment and having fun of the people, places they met in their daily lives or is it because of a fast moving of what is going on with regards of the issues, incidents we encounter and need to seek of  the answers for the sake of the doubt, or simply to help people to be aware of the technology, of  how could this be a great help for them,
could you please state of the reasons why????????
thanks po