CAPTCHA is a type of challenge-response test using in Google computers to determine if a user is human or a automatic robot. In the other words, is a process that the computer requires users to complete a simple test to evaluate, the entered right result will be the criteria to assess a human being. Goes easy on humans, drive hard on bots, reCAPTCHA takes advantage of intermediate risk analysis engine adaptive CAPTCHAs to keep automated software from engaging in abusive activities on your site. Let's try out to create a new one without wrecking your user experience.