How to Add Google reCAPTCHA to Magento

Captcha, i.e., Completely Automated Public Turing test to tell Computers and Humans Apart, is a service by Google that prevents the store from spam and bots. 

The default Magento 2 does not offer a reliable solution for security against spams, merchants have to rely on 3rd party solutions.

The best choice is Google-developed anti-spam reCAPTCHA that displays the “I’m not a robot” checkbox. 

Visit the method to add Google reCAPTCHA to Magento for more details