Is it ok for a laptop to go into standby or hibernate instead of turning it off?
Placing your laptop or computer into hibernation mode or standby mode instead of turning it off will in no way harm it.
Why hibernate instead of turning off computer?
When a computer is placed into hibernation mode, all the open programs are left in temporary storage. When the computer is turned back on, you'll be able to resume were you left off much faster and will not have to wait for the computer to start up.
Is it harmful to let a computer hibernate for multiple days?
Allowing a computer to hibernate for one day or multiple days will not hurt the computer. It will not result in extra wear on the computer hardware or corruption to computer software. It is common for computers in a business office to be left on and in hibernation mode for multiple days, especially over a weekend.
But it saves power to turn off the computer
According to Microsoft and Energy Star, placing a Windows ME or later computer into hibernation mode saves almost as much power as turning it off. However, to save as much power as possible, Energy Star still recommends turning the computer off.
I'll save disk space by not using hibernate
It is true that if hibernation is enabled and your computer is hibernating, it will use some of the disk space on your hard drive. If you are not hibernating your computer and need the disk space, see disable hibernation.