What is Hibernate Mode ?
Hibernate mode is a Power option like Sleep, Shutdown and Standby Modes, Which makes your PC in rest mode and pauses all the ongoing Processes , But When you Start your PC again all Processes will resume to the active mode just like they were at the time when they were held offline.
If you are using Mozilla with lots of pages loaded and You have a paint window with half completed Picture. And if you hibernate your PC at that instance , You can get them as same as they were before when you start your PC again even if you don’t pause them before hibernating.
How to Avail Hibernate Option on Windows ?
Screenshots for Reference :