Google ReCaptcha is a world popular captcha plugin. It is used on all across the web, and is not just limited for use in Joomla 3.5. It is helpful to implement spam protection on your Joomla websites. First we have to get public and private keys from google recaptcha site and generate it. This is a free service, but you will need a Google account to create captcha keys for your main domain. Configuring ReCaptcha for Joomla 3.6: Step 1: Log into your Joomla 3.5 Site Administrator. Step 2: Now go to your site Global Configuration settings and set Captcha -...