Initializing your console means it is returned to the initial state it was when it was purchased new.
Initializing your PS4 console becomes necessary if it’s too slow booting up, or freezes during gameplay.
To initialize your console you must start it in safe mode.
Press and hold the power button of your console for 8 seconds, at the second bip, release it and then you are in safe mode.
Select option 7, Initialize PS4 (reinstall system software).
