The tempered glass is a hardened glass specifically designed to cover and protect your mobile screen from scratches and other damage. It does not affect the functionality of the screen.
It features adhesive across its entire surface, unlike edge glue screens that only have glue around the perimeter. This helps ensure a better fit and smooth operation of the touch screen. Additionally, it prevents dust from getting underneath, which can happen with edge glue if the perimeter adhesive wears out.