
Advantages of reCaptcha are
Advanced Security
Helps State of the art spam & abuse protection for your website
Ease of Use
Low friction, effortless interaction for your users.
Creation of Value
Cost of Service
reCaptcha service is totally free.
Read more about reCaptcha here: https://www.google.com/recaptcha/intro/index.html
Introduction to no Captcha reCaptcha