This will definitely protects the main screen from minor scratches that you would get if you don't have a screen protector on

As far as, will it protect the real phone screen underneath this glass screen protector if it drops

It came with wet/dry wipes to clean the screen and a piece of cloth which I didn't use

PROS:-It was easy to install, and I did it in about 5 seconds.-Comes with everything you need to install and clean your screen, including: a screen cleaning cloth, a wet wipe, a dry wipe, and a dust removing pad.-Lightweight, and adds little to no extra bulk or weight.-Easy to install and use with a case.-Fit my SE

Dropped my phone couple of times and it helped protect my screen

protected my screen when my son dropped my phone.

Let's hope I never have to test it's capacity to handle a crack, since I haven't cracked the screen yet