Today, we’re excited to introduce reCAPTCHA v3, our newest API that helps you detect abusive traffic on your website without user interaction. Instead of showing a CAPTCHA challenge, reCAPTCHA v3 returns a score so you can choose the most appropriate action for your website.

https://webmasters.googleblog.com/2018/10/introducing-recaptcha-v3-new-way-to.html