How does it work?
With the Absolute Google reCAPTCHA extension you protect your Magento website against spam and other types of automated abuse, by using the official spam protection provided by Google. By installing this extension on your Magento website you can prevent spam bots from automatically populating your newsletter subscriber list with junk email addresses, and protect any other form on your website as required.
This extension provides an ‘invisible’ approach so your customers do not see an ugly CAPTCHA image to fill out and the entire process happens behind the scenes when you select Google Invisible reCAPTCHA mode. With Google reCAPTCHA V2 your customers only see the “I’m not a robot’ on selecting an element of your form.