Why is it necessary to follow shutdown procedures rather than turning off the computer like the television in other words what are its effects?
As you may know, a computer which is running has two side one
has to consider: 1. A running computer is an electrical device in
which billions of elementary operations take place per second. When
a computer is switched on, an avalance of tiny electric signals
travelling through tiny conductors, sets the computer in a state
which responds in a certain way to external signals, such as
keyboard input. It is extremely complicated and difficult for an
average user to interact with the machine on that level directly.
Therefor, there is special software writen which hides this
complicated interaction interface from the user and offers a much
more user-friendly interface to interact with. That is the... 2.
Operating System: the software which intermediates between a human
user and a computer machine. The operating system is able to
communicate both with the computer's complicated interface and with
the intuitive humans. Therefor, it is responsible for the
translation of human messages to the computer and vice-versa. The
operating System (Linux, MacOS, Windows, ...) is a quite
complicated software itself. It has to keep a big amount of
internal operation data. When a computer is being switched off, the
operating system has to make sure none of its internal structure is
ruined. That requires some extra time and computations to be run so
that the internal state of the operating system is "cleanly"
destroyed and the appropriate data stored to a persistent storage
medium (hard disk, for example). If there was a computer with no
operating system running on it (as there are some), one could just
pull the plug and no harm would be caused.