As shown in the previous illustration, when using reCAPTCHA, a user is prompted to enter a code into an AEM page. If the code is valid, a message appears. If the user enters an invalid code, a message appears letting the user know an invalid code was entered.
To read this development article, click https://helpx.adobe.com/experience-manager/using/aem_recaptcha.html.
To watch the video, see: