CAPTCHA is a way for websites to keep spam away. Users are asked to identify human-readable text. In theory, it is a perfect way of keeping away bots. But in reality, it's not user-friendly, and can be broken down by an algorithm easily. Google has begun rolling out a new API that simplifies the CAPTCHA experience. It is called the "No CAPTCHA reCAPTCHA", and it just requires one click from the user.
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