CAPTCHA prevents a bot from submitting forms. It’s often used in login apps, but you can also use it in the Forms app.
To enable CAPTCHA, click the form’s Options button
()
and select Settings. Enable the Require CAPTCHA setting, click Done, and
save the form. That’s all there is to it!
Figure 1: You can enable CAPTCHA for your form in the Form Settings window.
Figure 2: Once you enable CAPTCHA, your form has protection against bot submissions.