The tempered glass is a hardened glass, specially crafted to cover and protect your mobile screen from scratches and other damages. It does not affect the functionality of the screen. In case of a drop, it provides additional protection, although it does not guarantee that the screen won't break. It features adhesive across its entire surface, unlike edge glue screens, which have adhesive only on their perimeter. This helps with better application and smooth operation of the touch screen. Additionally, it prevents dust from getting underneath, which can happen with edge glue when the perimeter adhesive wears out.