The tempered glass is a reinforced glass specifically designed to cover and protect your mobile screen. It guards against scratches and other damages without affecting the functionality of the screen.
In case of a drop, there is no guarantee that the screen won't break, but it provides additional protection. It has adhesive over the entire surface, unlike edge glue glass protectors which only have adhesive around the perimeter. This contributes to better application and trouble-free touchscreen operation. Additionally, it prevents dust from passing underneath, which can happen with edge glue protectors when the perimeter adhesive wears out.