It should be used on a flat surface.
It should remain free of stickers and writing.
Clean the keyboard and screen with a soft cloth (or mostly dry disinfectant cloth) before closing.
No food or drink should be around the Chromebook.
Carry them closed and with two hands. Never pick up or carry a Chromebook by the screen alone.
Never put a large amount of weight on the Chromebook.
Don't leave them on the floor where they might be stepped on.
Never put anything on the keyboard and then close the lid (like a pencil), that will damage the screen.
Restarting the Chromebook solves most "issues" you might be experiencing.
This is super important, so you might want to make it a habit to shut it down every Friday.
It should be put back in the cart and plugged in when not in use.