Google reCAPTCHA is a security service developed by Google that helps protect websites from spam and abuse by distinguishing between human users and automated bots. It is designed to prevent bots from automatically accessing and interacting with websites while allowing legitimate users to access the content or perform specific actions.

The primary purpose of reCAPTCHA is to protect websites from spam, prevent unauthorized access, and secure online forms, such as registration pages, login forms, comment sections, and contact forms. By implementing reCAPTCHA, website owners can reduce the risk of receiving spam submissions, prevent brute-force attacks, and enhance overall security.

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