The tempered glass is a hardened glass specifically designed to cover and protect your mobile's screen from scratches and other damage. It does not affect the screen's functionality. In the event of a fall, it does not guarantee that the screen will not break along with it, but it provides additional protection.
It features adhesive across the entire surface, unlike edge glue screen protectors that only have adhesive around the perimeter. This helps with better application and trouble-free touch screen operation. Additionally, it prevents dust from passing underneath, which can happen with edge glue protectors when the perimeter adhesive deteriorates.