Calling them “‘I’m not a robot’ tests” is much more of a mouthful than their actual name: CAPTCHA. You’ve probably seen these letters, or else “reCAPTCHA,” accompanying some of ...

So, how does Captcha know that I’m not a robot? This brings us to the previous question of how CAPTCHAs can still work today, even if they’re generally used less frequently than in the past.

When you click on 'I'm Not a Robot', it is not just a basic action - it starts an in-depth investigation of your behavior and environment. The system looks at your page interactions before you click.