How Does Clicking a Box Prove Your Humanity? Is It Really Effective? or Can Someone Explain How Does

I tested this once! Turned on a bot script to auto-click the “I’m not a robot” box. Worked... until it didn’t.

After a few tries, the site forced me to solve image CAPTCHAs. So the box is more like a first filter.

How does clicking a box prove your humanity? It’s not foolproof, but it’s enough to stop lazy bots.