Difference between Shut down, Hibernate and Sleep

Difference between Shut down, Hibernate and Sleep in a Computer. When Should I use?
DIFFERENCE BETWEEN SHUT DOWN, HIBERNATE AND SLEEP

	SHUT DOWN	HIBERNATE	SLEEP
STATE	The Computer is Completely turned off	The Computer is in a low power state	The Computer is in a low power state
Battery (Power)	Almost no power	Less	More
Time	Plan to not use for a while	Plan not to use for an extended period of time	Away for just a little while
Programs	All programs are closed	All opened programs are moved from the RAM to the hard disk	All program remain in the Memory (RAM)
Start up time	Normal time it takes	fast	faster
When battery is almost drained, it hibernates
USB port	Not working	Not working	Working, thus can charge a device connected to it
Left Off	Start from beginning	Back where you left off	Back where you left off

Hope with this you have learnt the Difference between Shut down, Hibernate and Sleep in a Computer. When Should I use?
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