reCAPTCHA is a free service by Google that helps protect websites from various forms of automated abuse, such as spam registrations, credential stuffing, and data scraping. The script actively monitors user interactions and behavioral patterns on a webpage to assess the likelihood of a user being a bot. Based on this assessment, it may present a challenge (e.g., an 'I'm not a robot' checkbox, image selection, or an invisible check) to verify the user's humanity. The reCAPTCHA script integrates seamlessly with web forms and login pages. It works predominantly in the background, analyzing risk factors without interrupting the user experience for legitimate users. For suspicious activity, it provides a deterrent against automated attacks, ensuring that website interactions are legitimate.