The tempered glass is a hardened glass specially designed to cover and protect your mobile phone screen from scratches and other damage. It does not affect the functionality of the screen. In the event of a fall, it does not guarantee that the screen won't break along with it, but it offers additional protection.
It features adhesive across the entire surface, unlike edge glue glasses that only have glue around the perimeter. This helps with better application and seamless touch screen operation. Additionally, it prevents dust from getting underneath, which can happen with edge glue if the perimeter glue deteriorates.