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Invisible captcha is another feature of Google that verifies whether a particular user is human or a robot without requiring user interaction. This feature enhances the user experience and interface by reducing the effort needed to verify the captcha.
How it verifies an human?
Basically, this captcha verifies whether a user is human without requiring them to solve any challenges. It analyzes user behavior on your webpage, such as cursor movements, the frequency of button presses, and other activities to determine whether they resemble human or bot behavior. Based on this analysis, it will create a score that will lie between 0.1 and 0.9. If the values lie between 0.5 and 0.9, it means the user is human; if the score is below 0.5, we will consider the user a bot.