Bests & Worsts Reviews from Amazon

I really don't get the aim of this product. The products name is "screen protector" but what does it really protect the screen from? Dust..? Cause you can be sure it does not protect it for any damage. I bought this product together with my phone. And the first thing I have done was sticking this so called "screen protector" right after unboxing.The incident you see in the photo happened 2 days after I started using it. Don't even waste a penny on this. Wish I could get my money back.