Tempered glass is a hardened glass, specially made to cover and protect your mobile phone screen from scratches and other damage.
It does not affect the screen's functionality. In the event of a phone drop, it provides extra protection.
It is 3D, which means it has undergone special processing to acquire curved edges that cover the entire surface of the mobile phone screen.
In this way, it is not visible that the screen has protection, and the curved edges are also protected.