The tempered glass is a hardened glass, specially designed to cover and protect your mobile screen from scratches and other damages. It does not affect the function of the screen. In case of dropping your phone, it does not guarantee that the screen will not break along with it, but it provides additional protection. It features adhesive across its entire surface, unlike edge glue glass protectors which only have glue around the perimeter. This helps ensure better application and the smooth operation of the touch screen. Additionally, it prevents dust from getting underneath, which can happen with edge glue protectors when the perimeter glue wears out.