A screen protector is a great way to guard the screen on your iPad, Android tablet or Windows tablet against getting scratched. Dirt and grime can easily be wiped off and there is no risk that your stylus will drag any dirt around to scratch your screen either. And your stylus pen will work equally well with a screen protector. Ant-glare screen protectors gives your screen better visibility when outside.
Not all screen protectors are created equal, as with most things in life, you get what you pay for, be wary of cheap screen protectors, they won't last, will easily shred and creates a false sense of screen security!