I learned the hard way that a phone screen can look perfectly fine right up until the moment it doesn't. A few years ago, I had a phone sitting on my desk with a screen that was still almost spotless. I had been careful with it, too. No keys in the same pocket, no tossing it onto rough surfaces, and I rarely dropped it. Then one afternoon, the phone slipped from my hand and landed face-down on a rough floor. The screen protector cracked almost immediately. My first reaction was, “Great. The screen is probably ruined.” I peeled the protector off later and found something surprisingly satisfying: the actual display underneath was still perfectly intact. That experience changed how I looked at screen protectors. They aren't magic shields, and they certainly don't make a phone indestructible. But when you understand what they're designed to do, it becomes much easier to choose the right one and understand when it's actually worth using. So, how do screen protectors actu...